This has hurt many many many people over it's lifetime, by confusing their
multilib toolchains. Simply drop it outright. People who _really_ know what
they're doing are still perfectly entitled to "install" portions of this
project in suitable locations for their own use.
Most changes are noise from doxygen.
Readme udpated to explain newer FP_FLAGS for m7
stm32f7 library is skipped if the toolchain doesn't support it yet.
Renamed every instance of variable CFLAGS in target specific Makefiles
to TGT_CFLAGS to free up CFLAGS for user defined compiler flags.
Added information in README.md about existence and usage of CFLAGS
environment variable in build process.
Anatol Pomozov