Update AndroidServlet.java

Cleanup from refactoring
Update .travis.yml
Update AndroidServlet.java
Fixed bug if handler is not found
Refactored test to showcase issue #29 is actually working fine.
Fix for issue #25 which removes R Element global search context by default. If this is need by a user, execute script can be used for that. If elements are invisible they can be found found and interaction with them (getDisplyed) is working fine as you can see in the tests.
Include shown attribute in source output

Fix #30
Merge pull request #32 from bootstraponline/master

Include shown attribute in source output
Adding test for view attribute "shown" for native getPageSource. #32 #30
fixing typo
Update AUTHORS
 Merge branch 'master' of https://github.com/DominikDary/selendroid into HEAD
Update AUTHORS
selendroid standalone is able to respond to status requests.
 Merge branch 'master' of https://github.com/DominikDary/selendroid into server-standalone