Demo app changes:

Demo app changes:
Add a "query heap" command to the standard sample CLI commands.
Remove casting from configMAX_PRIORITIES setting in Win32 simulator demos as it was preventing a clean build.

Source code changes.
General tidy up and addition of assert points.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2323 1d2547de-c912-0410-9cb9-b8ca96c0e9e2