Put lpeg in package.preload, so it can be require'd.
Added obj dependency to Makefile, thus triggering recompilation if Makefile is modified.
Added experimental Lua 5.3 codebase

LPeg has a little fix to support 5.3 (version checking only!).
Small program toying with LPeg and the new bitwise operators.
Bug in argument parsing.

Need some code cleanup and better help message.