Core kernel code:
- Re-introduce the ability to give a mutex from an ISR.

Common demo code:
- Add additional tests into the GenQTest files for priority inheritance and using a mutex from an ISR.

git-svn-id: http://svn.code.sf.net/p/freertos/code/trunk@2294 1d2547de-c912-0410-9cb9-b8ca96c0e9e2