Splitting xunit dir into src and matlab-xunit.
Updating matlab-xunit/Contents.m

* Updating name, version, & release date
* Fixing typo
Updating matlab-xunit/info.xml

* Matlab release
* Package Name
* Website url
Updating the static HTML and XML files in doc.
Update README.md

Adding installation and usage info for non-XML output.
Update README.md

Someday I will stop occasionally typing `xunit-matlab` when I meant `matlab-xunit`.
Update README.md

Removing some superfluous backticks.