Continue to add the ability to create RTOS objects using static rather than dynamic...

Continue to add the ability to create RTOS objects using static rather than dynamic memory allocation - now including all the semaphore types.
Update the StaticAllocation.c standard demo file to exercise the new static allocation functions.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2406 1d2547de-c912-0410-9cb9-b8ca96c0e9e2