Import LZ4 source from https://code.google.com/p/lz4/source/detail?r=114
Remove LZ4 submodule.
Make porting vendored libs easier with a `fread` that works on a char array.
Make extracting lz4 data work.
Refactor.
Split exec command by spaces.
Limit data read from __DATA section to actual data size.
Return exit status of executed command.
Refactor.
Enable more warnings.
Run clang analyzer and disable more unused lz4 code.
Move archive_data to shared source file and start on bin.
Stash work on `kisstribute`.