[xwalkdriver] Fulfill Unimplement Autotest Commands

1. support query browser connection status.
2. support query application cache status.
3. support query browser orientation.
4. sync with crosswalk 11.40.271.0, update xwalkdriver64_20141224.
Merge pull request #10 from wuyuehang/orientation_cache_connection

[xwalkdriver] Fulfill Unimplement Autotest Commands