Android support library v4 added.

Look at https://leap.se/code/issues/5062#note-3:
I'm going to remove android-support-v4.jar from .gitignore based on https://developer.android.com/tools/support-library/index.html#overview and http://www.in-nomine.org/2012/02/26/adding-android-support-v4-to-your-android-application-in-intellij-idea/
testSwitchProvider updated.

It shouldn't expect the previous provider to be back again pressing the
back button after hitting "Switch provider".
New method to set on/off data connection.

Used in tests, but it's going to be used in the near future when
blocking data connections until EIP is on.
Set data connection status works.

Tested both in real device with Cyanogenmod 4.3.1 and in api 18
emulator.

Next step: wi-fi toggling.
Wi-Fi on/off method in ConnectionManager for tests
Merge branch 'feature/simulate-no-network-without-airplane-mode' into develop_test

Conflicts:
	AndroidManifest.xml
	tests/src/se/leap/bitmaskclient/test/testDashboard.java