Added R/O API
Review API now writable
Added TestCategoryAPI
Moved get_bool to apps.tools.string
Added Paper R/W API + hyperlinks GET option
TestReviewAPI now inherits from django.test.TestCase, causing the database to be cleaned before testing.
Merge branch 'feature-api'

Conflicts:
	openreview/apps/accounts/models.py
Call loaddata in setUp() of TestReviewFormLive as categories are needed.