Fix checking for null drawable

Merge pull request #5 from joaortk/master

Fix checking for null drawable

Added param to set clean button drawable

Merge pull request #4 from joaortk/master

Added clear text drawable parameter

Fixed bug with clear button text padding

Merge pull request #3 from joaortk/master

Fixed clear button drawing behind text

Fixed bug in clear button

Merge pull request #2 from joaortk/master

fixed clearButton

Bug fix

2.1.7

Merge with mater

Integrating with Vinicius Sossela fork.

Merge pull request #1 from ViniciusSossela/master

added option to disable the dotted line when disabled

Pause and Restart Text Listeners

2.1.5

Added funcionality to pause and restart textwatchers