Refs #397. Added numbered headers to wymiframe CSS file.
Merge branch 'master' into issue_397
Refs #409. Added structured_headings plugin. Numbered headings work for IE8 and above, Chrome, and Firefox.
Refs #409. Added tests for the structured headings plugin for its initialization and storage of CSS.
Refs #409. Revert changes made to the basic.html file for testing.
Refs #409. Added WYMeditor constant that specifies browser support for the structured headings plugin.
Refs #409. Improved unit test directory organization and moved structured headings tests to their own file.
Refs #409. Added example for the structured headings plugin.
Refs #409. Moved plugin documentation to its own top level section and added documentation for the structured headings plugin.
Merge pull request #409 from FriedRice/issue_409

Fixes #409 Create plugin for automatically-numbered headers in IE8