Update project files
Use Spannables and TextTransformationMethod (#14)

* Fixes `textAllCaps` (#12)
Update project files for AS 0.8.1
Added AutofitHelper

* Moved autofit logic from AutofitTextView
* Can utilize in any subclass of TextView (#13)
* AutofitHelper.OnTextSizeChangeListener to listen for textSize changes
Add AutofitLayout

* Wrap any View extending TextView to autofit in XML
Updated README
Update documentation
Release 0.2.0
0.2.1-SNAPSHOT
Update README.md
Update README.md

* Add badges
Fix warnings

- allowBackup lint warning
- javadoc errors