Refs #45: Add domain level field to talks
Update display of levels on proposal detail page
Refs #45: Add domain level field to talks
Update display of levels on proposal detail page
Remove domain_level from all but tutorials.
Merge branch 'feature/45-audience-level' of github.com:caktus/pycon into feature/45-audience-level

Conflicts:
	pycon/models.py
	symposion/templates/proposals/_proposal_fields.html
Fix bad conflict resolution
Don't mention sponsor tutorials in the docs, they don't seem to be used in 2014
Merge pull request #45 from caktus/feature/45-audience-level

Two audience level fields