Added initial models
Added handling for the bounds in the view
Roll back version change
Merge pull request #307 from alex/new-talk-review-system

Adds support for reviewing proposals in groups.
Merge branch 'staging' of github.com:PyCon/pycon into develop
Merge branch 'staging' of github.com:PyCon/pycon into develop
Moved top banner out of page head to resolve placement issues on schedule page.
Merge branch 'develop' of github.com:PyCon/pycon into develop
Sanitize HTML using bleach rather than html5lib

To resolve an incompatibility that arose after updating the latter.
Merge pull request #314 from PyCon/biblion-bleach

Sanitize HTML using bleach rather than html5lib