to run this, simply do python -m easybuild.test.suite
running on a lower python version you might need to set $PYTHONPATH

This improves test coverage + this code was never going to be used
anyway

This method can be extended in subclasses, this way they can pass extra
options to the EasyBlock constructor.
This was previously passed in via the constructor, but this was very
annoying for custom subclasses of Application

This is to aid mac os x support (see #16)

better gcc support for mac