Adding a test for switching to parent from an iframe
Implementing switch to parent frame in python binding
Regard all modifier keys in SingleKeyAction

26814a1b53fc added META, but COMMAND and LEFT_* were left out as
they were misinterpreted as aliases, which they aren't (they only
use the enum definition to get the same char code of the keys).

This time added a test case to avoid similar issues in the future.

Fixes
https://code.google.com/p/selenium/issues/detail?id=4843

Signed-off-by: Andreas Tolfsen <ato@mozilla.com>
Push context switching into a role-based interface.

Subclasses of RemoteWEbDriver that need this should extend TargetLocator
and use covariant return types to keep everything happy and sweet.
python switch_to_ deprecation / adding switch_to class like the other language bindings
updates for FF28 release, prebuilts need building
missed one spot for the FF28 bump
update FF prebuilts for linux
Merge branch 'master' of https://github.com/SeleniumHQ/selenium