Add test for enabling cell data via Settings app
Use SpecialPowers in place of switch_to_frame for getting and setting settings
Add lan tag for test_everythingme
Merge pull request #369 from zacc/add_manifest_tag_eme

Add lan tag for test_everythingme
Remove the permission at the end
Respond to cell data prompt and xfail due to bug 837664
Merge pull request #364 from bobsilverberg/cd

Add test for enabling cell data via Settings app
Merge pull request #368 from bobsilverberg/settings

Use SpecialPowers in place of switch_to_frame for getting and setting settings