Update to latest build tools.
Add new ZXing IntentIntegrator lib.
Adapt IntentIntegrator to match our needs.

Remove the previously bundled IntentIntegrator.
Fix IntentIntegrator to work properly without the support library.

Add a sample project without the support library.
Use ZXing core 3.0.1.
Merge remote-tracking branch 'origin/master' into rewrite
Prefix resources with zxing.

Remove many unused resources.
Move assets to zxing subfolder.

Remove unsused assets.
Add clone of zxing-android as zxing-android-legacy.
Minor fix for lint warnings.
Update zxing-android to zxing/zxing@081378fe93d985ddeb4ad39ea207164f0181ba47.
Fix and ignore some warnings.
Remove some dependencies from the integration module.

This caused potential manifest merging issues.
Add a "complete" barcode scanner library.
IntentIntegrator chooses the version to use based on API version.
Update the readme with the latest multi-version changes.

Update version.
Update sample project.
Split Java source files between modified and unmodified.
Split resources between original and modified.

Script keep get original resources up-to-date.
Don't display ActionBar.