Add option to specify custom typeface for accent texts

Updated the readme and sample as well
Add option for custom floating label text

Updated readme and sample activity. Will default to hint if floatingLabelText is null or not provided
Some formatting
Add custom font and label text functionality to the autocomplete view
call postInvalidate() after setting accent typeface
Check against floatingLabelText in autocomplete view for drawing
Merge pull request #23 from hzsweers/master

Add options for setting custom typeface for accent texts and custom text for floating label