Add full GitHub paths for INSTALL.md and CHANGES.md

README.rst

@@ -47,7 +47,7 @@ standard packages shipped with Python version 2.7.x.
 mtools is not currently compatible with Python 3.
 
 Some of the tools have additional dependencies, which are listed under the
-specific tool's section. See the `INSTALL.md <./INSTALL.md>`__ file for
+specific tool's section. See the `INSTALL.md <https://github.com/rueckstiess/mtools/blob/develop/INSTALL.md>`__ file for
 installation instructions for these modules.
 
 The mtools utilities are only tested with currently supported (non End-of-Life)
@@ -57,7 +57,7 @@ or newer.
 Recent Changes
 --------------
 
-The current version of mtools is 1.3.1. See `CHANGES.md <./CHANGES.md>`__ for a
+The current version of mtools is 1.3.1. See `CHANGES.md <https://github.com/rueckstiess/mtools/blob/develop/CHANGES.md>`__ for a
 list of recent changes from previous versions of mtools.
 
 Contribute to mtools