Fresh directory structure, gradle 1.12 build system.
Updated zxing-core to 3.1.
Added zxing-android as a library.
Removed CaptureActivity and set zxing-android as library.
Code cleanup.
Added portrait mode for API >= 13.
Gradle clean.
Added LauncherActivity.
Updated .gitignore.
Removed application directive in zxing-android AndroidManifest.xml.
Updated portrait and reverted landscape modes.
Updated README file.