Bug 845763 - [Contacts] Define a connector to import contacts from Gmail
Bug 847241 - Make switching to an app feel faster r=timdream

- use the event appopen instead of appwillopen to hide the card switcher; this
  makes the card switcher disappear after showing the app, and thus this is
  nicer.
- disable the transition when we want to remove "immediately" the card switcher
- add some unit tests about the card switcher showing or hiding
Bug 847322 - [email] Batch edit deletion should not prompt when there are no selected messages
Merge pull request #8433 from asutherland/Bug_828877_No_confirmation_when_messages_not_selected

Bug 847322 - [email] Batch edit deletion should not prompt when there are no selected messages r=asuth
Merge pull request #8389 from arcturus/bug-845763

Bug 845763 - [Contacts] Define a connector to import contacts from Gmail
Bug 844770 - [SMS] Optimize starting time with lazy-load r=julienw
Merge pull request #8337 from borjasalguero/optimize_loading_time

Bug 844770 - [SMS] Optimize starting time with lazy-load r=julienw
Bug 847316 - Remove some unused code in the clock app - again. r=etienne
[Bug 847358] change stats param requestId->originatingRequestId  [r=crdlc]
Merge pull request #8438 from EverythingMe/stats-requestId

[Bug 847358] change stats param requestId->originatingRequestId  [r=crdlc]
Bug 847241 - Make switching to an app feel faster

Last-minute follow-up: revert the change to the visibility transition, as it
made the display transition invisible.
Bug 847395 - Blacklist new communication imports subdirectories