Fix the distribution configuration to work properly

include all the headers in the tarball (some are 'noinst')
put the jstruct headers in $(includedir)/jstruct/*
Add a note for the confusing libtool .so version info setting.

.travis.yml

@@ -20,3 +20,6 @@ script:
     - cat tests/test-suite.log
     - tests/test_all.py
     - LD_LIBRARY_PATH=jstruct/.libs/ CK_FORK="no" valgrind --leak-check=yes tests/.libs/check_jstruct
+    - make dist
+    - tar -zxf libjstruct-la-*.tar.gz
+    - cd $(find ./ -name 'libjstruct-la-*.*.*') && ./configure && make && sudo make install

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([libjstruct.la], [0.0.5], [[email protected]])
+AC_INIT([libjstruct.la], [0.0.6], [[email protected]])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 

jstruct/Makefile.am

@@ -1,5 +1,13 @@
 ## Process this file with automake to produce Makefile.in
 
 lib_LTLIBRARIES = libjstruct.la
+
+libjstructincludedir = $(includedir)/jstruct
 libjstruct_la_SOURCES = jstruct.c jstruct_private.c error.c export.c import.c
-include_HEADERS = jstruct.h export.h import.h error.h result.h
+# libtool -version-info c:r:a
+# no interface change: bump revision only, don’t touch current nor age.
+# interface change: set revision to 0, bump current and age.
+# recompile/link change:  Bump current, set revision and age to 0.
+libjstruct_la_LDFLAGS = -version-info 0:0:0
+libjstructinclude_HEADERS = jstruct.h export.h import.h error.h result.h
+noinst_HEADERS = jstruct_private.h export_private.h import_private.h error.init.h result.init.h