[fatal] Fix crash on exception thrown in task queue
Fixed: Missing json import
Add sanity checks when replacing predicate objects in via Subject.replace()
[cosmetic] Clarify upgrade process in Subject.extendClass()
[theaudiodb] Corrected variable name from artist to title
Generalize title discovery algorithm to handle URLs per Internet RFC specs
Add the following predicates: dc:type, representing genres, and video:trailer for movie trailers
Minor media_item.py changes

* removed unused json import
* removed unused mime_type variable
Add Eclipse project files to .gitignore
Render about.tex documentation into PDF form
Added CachedSimpleResource, a resource task that transparently uses the local filesystem to speed up access to remote URIs
Added TheGamesDB scraper

Thanks to Malte for initial structure of the scraper