Fixed typo in comment plugin.  Well, fixed correctly spelled use of
$comment->anonymous to match 'annonymous' spelling in actual comment
table!
Fix for issue with saving repeat group data, wehere we used the wrong PK
name (we used the field name of the parent, not the child table).  So
saving repeat data worked if PK names were the same (like 'id'), but
failed if the names were different.
Adding experimental feature to allow fetching JS files from a CDN, new
global option "RequireJS Base URI".  May cause XSS issues, but have a
Pro user who wants to try it out, with their JS in S3, so committing for
now.  May remove at a later date if it proves to be unworkable.