Updating readme
Add Restricting ability to the tags, to disallow new tags from being created for a specific field
Merge remote-tracking branch 'tyrelzouza/master' (restricted tag input)
insert hashbang in setup.py and make it executable, minor fixes to readme to remove stray restructuredtext
Merge pull request #1 from uAnywhere/master

Merge @tyrelsouza's restricted tag selection branch, minor readme fixing, make setup.py executable (#6)