Merge pull request #7 from morfoh/lua-5.1.4

Documentation installation related fixes
Merge pull request #8 from morfoh/lua-5.1.4

lua.pc.in: add INSTALL_{L,C}MOD variables
Merge branch 'lua-5.1.5' of git://github.com/morfoh/autotoolized-lua into lua-5.1.5

Fixes #10.
Add a script to generate patches
Merge branch 'lua-5.1.5' of git://github.com/akheron/autotoolized-lua into morfoh/autotoolized-lua/lua-5.1.5