* Version 2.13.1 released.
==========================
Tag sources with `VER-2-13-1'.
* docs/VERSION.TXT: Add entry for version 2.13.1.
* docs/CHANGES: Updated.
* docs/release, docs/README, builds/macs/README: Updated.
* README, src/base/ftver.rc, builds/windows/vc2010/index.html,
builds/windows/visualc/index.html, builds/windows/visualce/index.html,
builds/wince/vc2005-ce/index.html, builds/wince/vc2008-ce/index.html,
docs/freetype-config.1: s/2.13.0/2.13/1/, s/2130/2131/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 1.
* builds/unix/configure.raw (version_info): Set to 26:0:20.
* CMakeLists.txt (VERSION_PATCH): Set to 1.
* subprojects/libpng.wrap, subprojects/zlib.wrap, subprojects/dlg: Updated.
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