Fixed #218: now using getClass().getSimpleName() to report an error when
the activity cannot be found. This what Robotium uses, so this will get
developers better information when there is a problem.
Add current_activity

Gist https://gist.github.com/bootstraponline/4589830
Discussion https://groups.google.com/group/calabash-android/browse_thread/thread/f1dc35315cb21eb5
Fix #218
Fix #198
Merge pull request #220 from bootstraponline/focused_activity

Add current_activity
Merge pull request #219 from ustwo/issue-218

Fixed #218
Changing to new version of screenshotTaker.jar.
Has much less overhead that the previous version.

The source for screenshotTaker is available in a separat repo for now.
https://github.com/calabash/screenshotTaker

The source will probably get merged into calabash-android at some point.
Updating Android api