Merge pull request #3 from jpav/master

Closes #8
Merge pull request #4 from jpav/master

Removed unused import
Merge pull request #5 from jpav/master

Fixed javadoc errors
Merge pull request #6 from jpav/master

Fixed comment in pom
Merge pull request #7 from jpav/master

Updated README.md
Merge pull request #8 from jpav/master

Added EPL license
Merge pull request #9 from jpav/master

Started work on TreeSpinner widget
Completed more of TreeSpinner