Add a few 'long' methods, support tuple sublasses, add uuid test and fix a _struct GC bug

I don't know how well this is followed in practice, but "!"
is supposed to just be for irgen-specific names that should
not make it to other tiers.  The closure and generator variables
are more like part of the inter-tier contract, so I think make more
sense as "#" names.

Add the zipimport, csv and ssl module

and let file.next() raise a StopException when on the end
To make the csv module work on files.

travis try enabling apt cache

Add bytearray and add a memoryview test

don't let AttributeError exceptions bubble out of softspace.  fixes fasta.py

virtualenv fixes

implement PyNumber_Divmod to fix datetime.timedelta(0)

Add unichr()

make tester produce useful help messages

Also, try to set the HAVE_NEWBUFFER flag more accurately