Gracefully handle situation where incorrect # of localizations is specified
Merge pull request #103 from square/tim/squash-17

Gracefully handle situation where incorrect # of localizations is specif...
Fixes whitespace escaping issue on translation edit page
Create KeyGroup data model
Change what is presented in /api/v1/key_groups/{key_name} endpoint
wip
move keygroup's import related code into an importer
wip
wip
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rebasing re-done
wip - has_metadatacolumn is buggy as hell
wip