erlc: update {id, git} in .app.src with git describe output
Merge branch 'add-git-describe-to-id-field' of git://github.com/dch/erlang.mk
[inaka/elvis#96] Elvis plugin.
Merge branch 'jfacorro.elvis.96.plugin' of git://github.com/inaka/erlang.mk
Alphabetical order build.config
Don't distclean PKG_FILE2 if it's custom
Compile Makefile-free dependencies with +debug_info only

As much as I dislike this change, this should simplify the
process of moving to erlang.mk.
Allow overriding the method and directories analyzed by Dialyzer
Add an erlang-mk target for automated updating of erlang.mk
[inaka/elvis#96] Elvis plugin, updated README.
Update Ranch, Cowlib and Cowboy versions
Merge branch 'facorro.elvis.96.plugin.readme' of git://github.com/inaka/erlang.mk