Refs #323. Added a test demonstrating the parser bug.

I hate you, parser.
Added a few test cases showing bug
Added a new xhtml parser mode to handle self closing tags
Self closing tags that are not valid inline_tags trigger ClosingTag method
Added a new test for iframes and reworked embedded tests to be treated as void tags
Reworked selfclosing tag behaviour and added iframe to block tags list
Merge pull request #382 from craigerm/selfclosingtag-mode

Fixes #323. Added SelfClosingTag mode to support inline tags
Refs #323. Added Craig MacGregor to authors along with a changelog entry.
Made a few <br>s self-closing.
Corrected examples and testcases.
Updated development.html to HTML5 (contenteditable needs that).
What’s in a name?
Changed &nbsp; into XHTML-friendly &#160;
Fullscreen button had no tooltip
Fixed failing FF test caused by bad browser version string comparison.
Added a #346 update note and added Philipp Cordes to authors.
Merge pull request #383 from wymeditor/issue_346

Tweaks to #346 XHTML bugs
Added support for compiling with Closure, fixed up Makefile so it uses file-based dependancies rather than target depdendancies.  Still uses UglifyJS by default.  Added documentation for Closure compilation method.
Minor Markdown syntax fixing.
Refs #381. Minor readme tweaks for closure vs uglifyjs.
Refs #381. Added changelog entries and added Michael Farrell to AUTHORS