Add junit.xml support

[sontek]

JUnit.xml is a standard format that systems like jenkins support for giving test error results. A sample report:

https://gist.github.com/sontek/7059671

Gives you error output, line numbers, etc. So you can give actual details into what failed.

[sontek]

Each test runner should be able to tell strider where they placed their test report and strider should pick it up to give nice output of why the tests passed/failed.

[jaredly]

sounds like a great idea for a plugin

[jaredly]

see the strider-blanket plugin for an example of how to add some html to the build page