Added status column (active, completed, failed) to call log CSV. Fixes #532
Download project phone book as CSV, including some usage stats per contact.
Fixes #516: User with shared project gets access denied through Phone Book API
Fixed alto_guisso repository location
Fixed #520: Allow user to specify SMS channel in Send SMS step
Fixes #612: Added phone_number as an implicit (readonly) variable
Merge branch 'hotfix-2.3.10'