[SMLRAppDelegate] Code Cleanup: spacings
[bootstrap-liblinphone.sh] Code Cleanup
[SMLRPhoneManager] Code Cleanup: removed unneeded TODOs
[SMLRAppDelegate] requires background privileges while registering for push notifications
[Main_iPhone.storyboard] Code Cleanup: rearrange for iPhone 6+ size
[SMLRAgreeViewController] GUI Styling: Code Cleanup: element order
[SMLRAgreeViewController] GUI Styling: added constraints to center elements
[SMLRVerifyNumberViewController] GUI Styling: added constraints to center elements
[SMLRCreateAccountViewController] GUI Styling: added constraints to center elements
[CallViewController] more GUI styling
[CallViewController] now showes/hides network quality view
Merge pull request #3 from simlar/pullrequest-code-cleanup-1

Pullrequest: Code Cleanup
Merge pull request #2 from simlar/pullrequest-remove-observers

PullRequest: SMLRAddressBookViewController now removes oberservers when disappaering
Merge pull request #4 from simlar/pullrequest-push-notification-after-reboot

Pullrequest: Fix receiving push notification after reboot
Merge pull request #5 from simlar/pullrequest-gui-styling-1

Pullrequest: Gui Styling 1
[Main_iPhone.storyboard] xcode update 6.1.1
[Main_iPad.storyboard] xcode update 6.1.1
[xcode] now uses Main_iPhone for the iPad, too
[Main_iPad.storyboard] removed
[Main.storyboard] Code Cleanup: renamed Main_iPhone.storyboard -> Main.storyboard