Functional improvements pre-selected tags and entering tags

- Removed pre-selected tags from the bucket to avoid duplicates
- You can now directly press enter if you have only 1 tag left in the suggested list

Signed-off-by: Vincent van den Tol <vincent@newsportsolutions.nl>
Fixed array iteration issue with preselected tags

Signed-off-by: Vincent van den Tol <vincent@newsportsolutions.nl>
Merge branch 'master' of github.com:vvdt/jquery-tagbox

Signed-off-by: Vincent van den Tol <vincent@newsportsolutions.nl>

Conflicts:
	js/jquery.tagbox.js