Support sizes in photo media item.
fix JSQVideoMediaItem typo. close #570
remove video item
re-add video item
minor fixes
update JSQLocationMediaItem to specify a custom map region. close #565
add spec to project
prepareForReuse
improve scrolling performance. we don't need to keep calling setNeedsUpdateConstraints. ref #492.
new flow layout item size helper method
use new collection view layout size helper method. cap label heights and avatar sizes constraints to 1.0 to fix auto-layout warnings. ref #322
add new empty strings file. ref #237
complete localization! close #237 whoo! :)
refactor assets directory. use asset bundle. update categories for bundle. update tests
update demo
Allow using a custom nib. ref #563
more edits for #563
Revert keyboard as input toolbar due to bugs, fix some issues
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	JSQMessages.xcodeproj/project.pbxproj
	JSQMessagesViewController/Categories/JSQSystemSoundPlayer+JSQMessages.m
	JSQMessagesViewController/Factories/JSQMessagesToolbarButtonFactory.m