Rename history.html, fix links on its subpages

about/history/index.html

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-title: Empty document to protect directory
+title: History
+parent: About
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+has_children: true
+nav_order: 1
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+
+<p>
+  Although, fortunately, GAP is not yet part of history,
+  we have kept a few documents marking steps of its development.
+  In particular, the prefaces of the manuals of the various releases
+  sketch the respective progress. We present here links to (relevant
+  extracts from) these prefaces as well as to some 'interim reports'
+  that appeared in the GAP Forum. (For recent developments see the
+  <a href="https://github.com/gap-system/gap/blob/master/CHANGES.md">Release&nbsp;history</a>.)
+
+</p>
+<ul>
+  <li>
+    Preface for
+    <a href="preface_2.4.html">GAP&nbsp;2.4</a>, the first publically
+    released version of GAP&nbsp; (JN, December 1988)
+  </li>
+  <li>
+    Preface for
+    <a href="preface_3.1.html">GAP&nbsp;3.1</a>&nbsp; (JN, March 1991)
+  </li>
+  <li>
+    From the preface for
+    <a href="preface_3.2.html">GAP&nbsp;3.2</a>&nbsp;
+    (JN, January 1993)
+  </li>
+  <li>
+    Preface for
+    <a href="preface_3.4.3.html">GAP&nbsp;3.4.3</a>, the last
+    GAP&nbsp;3 release from Aachen&nbsp; (JN, June 1994)
+  </li>
+  <li>
+    Interim Report
+    <a href="{{ site.baseurl }}/ForumArchive/Neubuese.1/Joachim.1/GAP,_199.1/1.html">
+    GAP,&nbsp;1997,&nbsp;me&nbsp;and&nbsp;all&nbsp;that</a>&nbsp;
+    (JN, June 1995)
+  </li>
+  <li>
+    Interim Report
+    <a href="{{ site.baseurl }}/ForumArchive/Neubuese.1/Joachim.1/Interim_.1/1.html">
+    Organizing&nbsp;GAP</a>&nbsp; (JN, December 1995)
+  </li>
+  <li>
+    Interim Report
+    <a href="{{ site.baseurl }}/ForumArchive/Neubuese.1/Joachim.1/interim_.1/1.html">
+    A&nbsp;European&nbsp;summer&nbsp;of&nbsp;CGT&nbsp;'97</a>&nbsp;
+    (JN, July 1996)
+  </li>
+  <li>
+    Interim Report
+    <a href="{{ site.baseurl }}/ForumArchive/Neubuese.1/Joachim.1/Interim_.2/1.html">
+    WWW&nbsp;pages&nbsp;and&nbsp;refereeing</a>&nbsp;
+    (SL + JN, September 1996)
+  </li>
+  <li>
+    From the preface for
+    <a href="preface_3.4.4.html">GAP&nbsp;3.4.4</a>&nbsp;
+    (SL, April 1997)
+  </li>
+  <li>
+    Interim Report
+    <a href="{{ site.baseurl }}/ForumArchive/Neubuese.1/Joachim.1/INTERIM_.1/1.html">
+    Move&nbsp;of&nbsp;GAP&nbsp;addresses</a>&nbsp;
+    (JN, June 1997)
+  </li>
+  <li>
+    Forum letter
+    <a href="{{ site.baseurl }}/ForumArchive/Wright.1/Charles.1/Contribu.2/1.html">
+    Contributions&nbsp;to&nbsp;GAP</a>&nbsp; (CW, July 1997)
+  </li>
+  <li>
+    From the preface for
+    <a href="preface_4.B.1.html">GAP&nbsp;4.B.1</a>, the first beta
+    release of GAP&nbsp;4&nbsp; (JN, July 1997)
+  </li>
+  <li>
+    From the preface for
+    <a href="preface_4.1.html">GAP&nbsp;4.1</a>&nbsp; (SL, July 1999)
+  </li>
+  <li>
+    Preface for
+    <a href="preface_4.3.html">GAP&nbsp;4.3</a>&nbsp; (SL, May 2002)
+  </li>
+  <li>
+    Preface for
+    <a href="preface_4.4.html">GAP&nbsp;4.4</a>&nbsp; (AH, March 2004)
+  </li>
+  <li>
+    Preface for
+    {% include ref.html label="Preface" text="GAP&nbsp;4.5" %}&nbsp;
+    (June 2012)
+  </li>
+</ul>
+
+<h3>GAP Council</h3>
+The <a href="{{ site.baseurl }}/council/"> Council</a>, was formed in 1995 to provide broad
+policy advice for the future development of GAP.
+It served as an editorial board for GAP packages until 2024, but its interests extend more broadly, to include
+enhancing recognition not only of GAP itself but also of
+the whole field of computational group theory.
+
+<h3>GAP Centres</h3>
+In March 2005 the GAP Council and the GAP developers have agreed that status and responsibilities of "GAP Headquarters" should be passed to
+an equal collaboration of a number of <a href="{{ site.baseurl}}/centres/">GAP Centres</a>, where there is
+permanent staff involvement and an element of collective or organisational commitment, while fully recognising the vital
+contributions of many individuals outside those Centres.

about/history/preface_2.4.html

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 title: Preface of GAP 2.4
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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about/history/preface_3.1.html

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 title: Preface of GAP 3.1
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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about/history/preface_3.2.html

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 title: From the Preface of GAP 3.2
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
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about/history/preface_3.4.3.html

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 title: Preface of GAP 3.4.3
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
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about/history/preface_3.4.4.html

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 title: From the Preface of GAP 3.4.4
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
 ---
 

about/history/preface_4.1.html

@@ -1,8 +1,8 @@
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 title: From the Preface of GAP 4.1
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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about/history/preface_4.3.html

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 title: From the Preface of GAP 4.3
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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about/history/preface_4.4.html

@@ -1,8 +1,8 @@
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 title: From the Preface of GAP 4.4
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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about/history/preface_4.B.1.html

@@ -1,8 +1,8 @@
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 title: From the Preface of GAP 4.B.1
 grand_parent: About
+parent: History
 layout: default_with_title
-parent: Some History of GAP
 nav_exclude: true
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