* Extends :map filter run prefix to provide the variables index, revIndex and length to bring it into line with :reduce
* update :maps examples
* docs: fix formatting issue with documentation
* Make currentTiddler variable consistent in subfilters and filter run prefixes
* Updated filterun prefix and subfilter operators to use ..currentTiddler instead of outerCurrentTiddler
* Add :sort filter run prefix, docs and tests. Also extended .utils.makeCompareFunction with a flag for caseSensitivity.
* Documentation updates
* Move case sensitivity handling entirely to utils method so it is reusable
* Changed the filterrunprefixes to use LinkedList
* Testing for Linked List
* Finishing touches to LinkedList
* Minor corrections to link-list coding style
* Corrected for sneaky bug in linkedList
* First pass at refactoring filter code to support named filter run prefixes
* Remove filter prefix for now
* renamed module type and filter run prefixes
* Moved inline handling for no filter run prefix to 'or' filter run prefix.
* Added error handling for undefined filter run prefixes