More general/neutral default options in rebar.config, and improved self-documentation.
Added [raw] option to rebar configuration which, as indicated by carlosvarelap, is the right way to specify that compilation of that particular dependency is not to be taken care of by rebar.
Fixed typo in comment.
Renamed wrangler building script to a more suitable name now.
Merge pull request #4 from lauramcastro/master

Tyding up of rebar.config + proper setting for non-OTP dependency