Updated to lua-5.3.2

Merge loadlib changes to loadlib_rel.

Fix build when using Visual Studio, incorrect setup of dllexports.

Minor merge of loadlib.c into loadlib_rel.c

Merge branch 'master' of git://github.com/LuaDist/lua

* 'master' of git://github.com/LuaDist/lua:
  Correction of path format
  Loadlib fix for newer Cygwin releases

Loadlib fix for recent Cygwin releases

Merge pull request LuaDist#5 from greg-a/master

fix error and mem leak found by cppcheck

Fixed reference to rc file for wlua

Updated rc files

Added LUA_PATH entry. On Windows added wlua. Closes #50. Closes #51