sudar/Arduino-Makefile — pull request #263 by peplin (2014-09-10 15:15:12+00:00)
Title: Document CFLAGS, CXXFLAGS, ASFLAGS and CPPFLAGS.

After understanding the difference between CXXFLAGS and CPPFLAGS, this
is a revised commit for https://github.com/sudar/Arduino-Makefile/pull/257