[android] Update parse dependency to 1.4.0
First stab at handling push notifications in Android.

We only publish through the Play Store, so use Google's standard push receiver
instead of Parse's custom built one.

Upon clicking a notification, the app should open to the right page, whether
that's Bulletin or Newsletter is determined from the "channel" extra.
Get rid of an unnecessary level of nesting.
Merge branch 'master' into feature/parse-push

Conflicts:
	Android/Sebastiaanschool/Sebastiaanschool.iml
	SebastiaanCloudCode/cloud/main.js
[android] Add missing manifest entries to make parse push work.
[android] Various push notification things:

- use Actions instead of Channels to determine which page to open.
- use a small, white push notification icon, conforming to the
  style guide.
- drop the `packageNameSuffix` for debug builds, because it inter-
  feres with the push message receiver component.
Merge branch 'master' into feature/parse-push
[android] I accidentally the iml file.
Merge branch 'master' into feature/parse-push
Re-enable channel subscription.

This turns out to be the most reliable way to deliver push messages
with the desired information (which screen to open).
Remove unused intent filters from Android Manifest.
Merge branch 'feature/parse-push' into 'master'.