colorful make output! yum!

[Janek Warchoł]

Hi,

my cousin Franek changed the output of make from a heap of unreadable
gobbledygook to some delicious eye-candy!  Checkout branch
dev/frax/colorful-make and build lilypond.  How do you like it?

As for me, i can spend whole day just looking at lilypond being built.
 I think we should add this to master asap :D (of course, after
polishing some rough edges)

Janek