Add search id

Ruby example of finding all strings.xml ids that contain the value feedback.

mobile :searchId, 'feedback'
Add mobile resolveId

Scroll requires the text in advance so resolveId is required. Ruby example:

mobile :resolveId, 'my_id'
Merge pull request #772 from bootstraponline/search_id

Add search id and resolve id.
Add search strings.xml value

Useful for finding all keys that contain a common string.

mobile :searchValue, 'preferences_delete'
Merge pull request #775 from bootstraponline/search_value

Add search strings.xml value
Update selendroid
Merge pull request #781 from bootstraponline/update_selendroid

Update selendroid
Fix #776
Merge pull request #784 from bootstraponline/776

Fix #776