Added app/app.iml to gitignore and removed from repo
Allow debug package side-by-side installation with release package.

* Modify build.gradle to add ".debug" to the package name
* Modify layout/plan.xml to change the xmlns of custom control so gradle will insert the appropriate package name during each type's build.
Removed app_name string from translations because it is not different from default language.
Moved app_name string to its own file so we can overlay it with a string from debug resources
Added resources to visually differentiate debug build.
Merge pull request #35 from damccull/SideBySideInstall

Side by side install