Caches user email in ChangesHistoryRecord model
Caches user org name in ChangesHistoryRecord model
Fixes a bug in the activity viewer
Stores the org name for each change
Merge branch 'production' into staging
wip
Allows to synchronize projects through excel files
Removes unneeded gem
Adds agencies in public section
Merge branch 'staging' of github.com:Vizzuality/iom into staging

Conflicts:
	lib/model_changes_recorder.rb