Build products for v0.2.3
rebased locabuild after nano commit
now uses LIB_CORE_LIBRARIES_PATH instead of applications/libraries

everything (i.e. user libs) in LIB_CORE_LIBRARIES_PATH is gitignored
except Serial2

to use Serial2 now you'd have to #include "Serial2/Serial2.h"

fixed typo in makefile
changed path to libraries to clean
no longer need to specify INCLUDE_DIRS here
libraries no longer lives here
Documentation!!!
where we're going, we don't need trailing slashes!
Added a template build.mk for tinker, with instructions inside