JaxEdit release 0.22

[Z.H.]

New JaxEdit release with version 0.22 is out with the following changes:

- design new homepage for jaxedit.com
- update codemirror to 3.0 and mathjax to 2.1
- enable syntax highlight and bracket matching
- enable auto closing for latex environments

- move drive selector to the left in header bar

- use localjs=true option to disable mathjax cdn

- use highlight=false option to disable codemirror

- fix click event problem when presenting in iPad

- fix empty content problem with lists and theorems

Please visit JaxEdit's homepage for more details: http://jaxedit.com/ .