Allow @base URI to have a trailing hash '#'

[nicholsn]

This PR is to address #379 and allow the @base directive URI to have a trailing hash '#'.

• adds a test for both @prefix and @base to allow trailing hash
• comments out previous check for hash ported over from cwm

[satra]

i would maintain py2.6 compatibility if the rest of rdflib is py2.6 compatible. all you need to do is add the check to your test.

like this:
https://github.com/trungdong/prov/blob/master/prov/tests/test_model.py#L23

[gromgull]

Looks good, thanks!

[nicholsn]

sweet, learned something new =)

is there a way to trigger travis w/o another commit? looks like the py2.6 had an error installing coveralls...

error: [Errno 104] Connection reset by peer

[gromgull]

There is a way to redo builds, but only for admins I'm afraid. I've started it now!

[nicholsn]

great, thank you! all passed and looks good to merge.

[gromgull]

Thanks!