Merge pull request #18 from megax/master

Makefile update
Bumped KopiLua with os.date
Added KopiLua build configuration (only to avoid regressions on KopiLua).
Removing GLOBALINDEX from NLua
Bump KeraLua
Added registry index API.
Fixed LuaIndexes
Bumped KeraLua
Added functions to compatibility between Lua 5.1/ 5.2
Added luanet_pushlstring. (lua_pushlstring have different signature in 5.1/5.2)
Updated version 1.0.70 (latest version supporting Lua 5.1.5)
Update NLua to Lua 5.2.2 (NLua 1.1.0)
Added LoadFileTests to iOS.
Removing Gendarme Warnings.
Added run_all.osx.kopilua.sh
Un-nest public classes.
Fixed gendarme warnings.
Un-nest LuaNativeFunction
Fixed build
Fixed iOS Build.
Fixed more gendarme warnings.
Bumped KopiLua with WP7 fix.