Fix #224
Fixed #225, now shutdown_test_server waits for app_running? to return false
or throws an exception otherwise.
Use default_device
Merge pull request #227 from bootstraponline/master

Use default_device
Closing APK file after reading the actions.
Merge branch 'issue-225' of https://github.com/ustwo/calabash-android into ustwo-issue-225
Fixing error message in the case the app could not get killed
Merge pull request #230 from inkspotch/master

Fix for closable leak