More descriptive error for failed image
If share is a post activity, share the object
Merge branch 'master' of github.com:e14n/pump.io
Better handling of shares
Skip join of non-group
Explicitly likes and faves have recipients same as original post
Check for duplicates better

These changes check better for duplicates and for non-local groups.

Conflicts:
	bin/pump-import-collection
Add underscore-contrib
Localize followers URL
Don't cause an error if there is no object type when creating content
Just use the followers.url property if it exists
Better localization of groups
Include some of the newer types in the schema