Adds various twanager utils which allow you to:
* lowercase all tags in a given bag
* uppercase all tags in a given bag
* remove whitespace from any tags in a given bag
* set a given field across all tiddlers in a bag
* remove a given field across all tiddlers in a bag
* map tags to another tag eg. Cat -> cat <- kitty
* rename a field in a given bag
* remove fields with a given value
* map fields from one value to another
This package is licensed under the same terms as TiddlyWeb itself.