Added WagtailTestCase class with a couple of useful methods
Added LOGIN_REDIRECT_URL to runtests.py settings
Use new WagtailTestCase class for checking redirect URLs in account management tests
Return user object from login method
Use WagtailTestCase class in admin page views tests
Made WagtailTestCase a mixin and renamed to WagtailTestUtils.
Fixed missing import
Added template used assertions into many tests
Added URL assertions to tests which test redirecting
Always use login method from WagtailTestUtils
Merge branch 'master' into tests-changes
Adding basic documentation for the image_formats feature.
margin causing problems in login screen solved
fix styling of preview button on create page when there are multiple preview modes
Merge pull request #310 from sixpearls/docs/image_formats

Adding basic documentation for the image_formats feature.
Add unit tests for wagtailcore/whitelist.py
Merge pull request #314 from mope/whitelist-tests

Add unit tests for wagtailcore/whitelist.py
Truncate long search strings

Search query strings must not exceed 255 characters; they will be
truncated if they do. Also added embedly library for Travis.
Merge pull request #316 from mope/313-query-string-crash

Truncate long search strings
all fields now display required asterisk when necessary