Support fetching custom from addresses
Support creating campaigns
Support finding campaigns by id
Support sending a campaign to a list of contact ids
Support Segment #find_by_id
Support #refresh! segments
Support #refresh_progress for segments
Add #send_to_segment for a campaign
Use AddressBookIds?
Add a version to the dependency of active support
Remove superflous builds
Revert "Add a version to the dependency of active support"

This reverts commit 79648f95eca11aa57860397308845a9e785df6ba.
Add #find_segment_by_id to Account
Addition of Segments and Campaigns