Adds a blacklist of album names and other smaller improvements

I've taken the freedom to add a blacklist setting when using this app. My reasoning is that you don't always want the 'Timeline Photos' or 'Profile Pictures' album and now you can easily ignore them by setting a FB_GALLERY_BLACKLIST list.

Other minor things were:
- I needed src_big for the thumbnails as the default ones are really too small. I tried to query for 'images' with fql, but that seems inconsistent. I can't always get the resolution that I want.
- I added photo_count, to be able to display the amount of pictures in the fb album, just like you see on the actual facebook page.
- Some minor PEP 8 adjustements.

Thank you so much for providing this, dantium. If it's okay with you, I'd like to add the following:
- django-cms hook so it easily integrates with django cms.
- dynamically generate git-related version numbering of the app in setup.py, to avoid colliding with released versions. Since I'm using pip, I would like to install this from github without colliding versions numbers. Where you planning on putting this up on PyPi?
- Update the readme to point to your website.