Allow plugins to provide their own jars

This change allows plugins to provide their own jars without
needing to add a library project.
remove notification receiver from manifest
remove extraneous view.onPause() call from onDrawFrame
remove referrer receiver
Merge pull request #36 from gameclosure/remove-install-referrer

remove referrer receiver
Merge pull request #35 from gameclosure/feature-plugin-jars

Allow plugins to provide their own jars
Merge pull request #34 from gameclosure/remove-notificationreceiver

remove notification receiver from manifest
password mode for TextPromptView
Merge pull request #37 from gameclosure/feature-prompt-password

password mode for TextPromptView
Releasing version release-0.1.12