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
Fixes links to organizations in activity list
Fixes links to organizations in activity list
Shows always the cached organization name in activities list
Shows always the cached organization name in activities list
Fixes activities list ngo user filter
Merge branch 'production' into staging
Merge branch 'master' into staging
Fixes some bugs with donations and agencies
Fixes donors tab selection when selecting agencies subtab