New Insert macro to replace old Include macro. Supports the following args:
* pagename - a name of a page or a regex resulting in a page list
* heading - title to use when inserting in to an element, otherwise a title to be added before the instert
* level - the level the heading should get (default = 0), if not using into
* noedit - setting noedit=True, will supress the edit link generated when using heading and the default formatter, and not printing
* from - regex describing from where on a page the insert should start
* to - regex describing to where on a page the insert should continue
* into - in to what element the insertion should be done
* sort - not specified means no sorting. Valid values are ascending and descending
* skip - how many pages in the pagelist to skip before starting to include them
* items - how many pages from the pagelist to include in total