Improved clang++ support and success messages on clean.
Undid utterly stupid clang++ "compatibility" change.
And again.
Improved Makefile warnings and output to be quieter on expected errors. Fixed ignored cleaning error in same vein.

This is a bit hacky, but it works.
MUST RUN "make veryclean"!

Massive Makefile changes to allow precompiled headers.
Merge branch 'master' of https://github.com/heidi-ann/zygote