Removed redundant source release.
Refactored Makefile for release and nightly builds.

--HG--
rename : scripts/osx/textadept => scripts/osx/textadept_osx
Use precompiled 64-bit libluajit.a for release and nightly builds; src/Makefile
Reverted to lfs 1.6.0 since later versions break the LuaJIT version.
Fixed module releases; src/Makefile