Move FieldDataCache assert to check both get and get_or_create
Remove assert stmt from i18n validate script
Removed all Push mode information

We should only support Pull mode

stud-1332
Edits from review

stud-1332
Merge pull request #2783 from edx/sarina/remove-assert-from-validate

Remove assert stmt from i18n validate script
Merge pull request #2787 from edx/markhoeber/documentation/stud-1332

Removed all Push mode information
Corrected info about angle brackets in labels
Merge pull request #2788 from edx/sylvia/documentation/DOC-65

Corrected info about angle brackets in labels
Add bok choy tests for forum comment editing
Merge pull request #2761 from edx/jbau/add-userid-to-FieldDataCache

Move FieldDataCache assert to check both get and get_or_create
Merge pull request #2774 from edx/gprice/edit-forum-comment-bok-choy

Add bok choy tests for forum comment editing