Edit API docs expanded with hooks, modelcluster, and InlinePanel usage
Splitup wagtailcore tests

wagtailcore/tests.py is getting a bit big so this commit splits them up into separate files

test_management_commands.py
test_page_model.py
test_page_permissions.py
test_page_queryset.py
tests.py
Fix indendation of Advert test model
Added two test snippet models definitions
Test ordering of snippet
Order snippet models during snippet registration
Comment changes so they are real in English
Merge pull request #293 from kaedroho/wagtailcore-tests-splitup

Split up wagtailcore tests
Reviewed by @gasman
Add comments to test models for clarity
Typo
Merge pull request #296 from rockingskier/ordered-snippets

Order snippet models alphabetically
Merge pull request #288 from jeffrey-hearn/docs-rev-2

Edit API docs expanded with hooks, modelcluster, and InlinePanel usage
Responsive embeds and images CSS suggestion
Cleanup of embedly settings load
Merge pull request #303 from jeffrey-hearn/embedly-cleanup

Bug: Embedly key argument never used
Merge pull request #302 from jeffrey-hearn/docs-embed-overflow-css

Docs: responsive embeds and images CSS suggestion