Full builds also include python (similar to -with-python before) & also
include cross architecture debugging. full builds are configurable via
the full_build_conf.sh file.

…ugging

Since not all targets have a supported simulator, there were compilation
errors. The configure file also appears to be half-broken, so we pass
--disable-sim when this feature is enable to avoid compilation failiure.

	I) Better names for makefile variables.
	II) Improved documentation on build types in the md files.
	III) Removed redundant parameters in build.sh & Improved
internal documentation