General copy paste rewriter

Replace the duplicate-URL detector with
a general copy-paste rewriter.

The copy-paste rewriter detects situations
where people use ctrl-v multiple times to
pad out a message and rewrites the message
so that the copy pasted stuff appears only once.
Minified latest changes
Merge pull request #51 from hugomg/copypaste

General copy paste rewriter
Fixed Issue #50

Items display properly with label tags now.
Updated to fix #50
shortened bugfix

Now uses less code to fix ui bugs
Update chat_filter.min.js
Merge pull request #53 from CodeFusionOne/master

Fixed UI Bugs from issue #50
Get rid of donger example in settings

It seems that test editors and minifiers are messing it
up way too often