Add support of silent rules

With a project built in silent rules (./configure --enable-silent-rules
or make V=0) the output is in the form:
  CC     foo.o
  CXX    bar.o
Merge branch 'master' of https://github.com/LudovicRousseau/Colormake into LudovicRousseau-master

Conflicts:
	colormake.pl
Merge branch 'LudovicRousseau-master'
Prepping a release for tomorrow with all the PRs merged