-- Changed the default value for the stdLib to an empty string and preventing it from being passed in the gcc toolchain unless it's explicitly set in the makefile.
-- Moved the objc abi version arg in the gcc toolchain to the extended command method and now not passing it if the input file is not an objective c/c++ file.
-- Updated the README and setup.py.
-- Fixed an out-of-date error message.
-- Fixed a string in the gui, making it more consistent with our usage pattern for unicode strings.