Fix for buildFilterJoin() for CDD and join elements.
Fixing canvas.js.  Use of variable name 'item' needs declaring as local,
as 'item' is now a built in JS function in IE11.  Specifically fixes
issue with image cropping in IE11, but probably fixes other IE11 issues
as well.
Fix for form view of new alt text for Please Select in filter view.
Added optional second arg to getContentTemplate() helper, so you can
specify which $part of the article you want - intro, full, or both.
Default is 'both', which is the current behavior of concat'ing the two.
Fixing keydown handling in autocomplete JS, wasn't testing to see if
focus was in the autocomplete field before stopped enter key presses, so
was breaking enter key in things like textareas
Merge branch 'joomla3' of https://github.com/Fabrik/fabrik into patch-40