Steps must be int or Java will crash

Fix #291
Add keyevent for Android
Merge pull request #310 from bootstraponline/mobile_keyevent

mobile: keyevent for Android
Merge pull request #303 from jlipps/master

host our own selenium guinea pig
Merge pull request #298 from bootstraponline/round

[Android] Steps must be int or Java will crash
test noSuchWindow
close() window for mobile safari iphone
tests for close() for ipad too
fixing weird multi-callback and object cleanup issues