Moved c_src into subdirectory epcap_nif/c_src
Added local rebar for C-code, as common rebar did not work (likely rebar bug).
Moved C-code part into rebar.config located in new local C-code directory epcap_nif/c_src.
Added debug output
Adapted path to epcap_nif/c_src/epcap
Corrected rules
Merge branch 'develop' of https://github.com/josemic/epcap into develop