* Add uniquetitle macro
This macro is a wrapper on the $tw.wiki.generateNewTitle function to return a unique name, it has been requested multiple times in the forums.
* Add documentation tiddler for uniquetitle macro
* Add uniquetitle macro examples
* Change name from uniquetitle to unusedtitle for clarity
The title isn't unique, just not currently used in the wiki.
* Update uniquetitle to unusedtitle
* Change uniquetitle to unusedtitle
* Fix a typo
