xTaskGetTaskHandle() changed to xTaskGetHandle().

xTaskGetTaskHandle() changed to xTaskGetHandle().
Tidy up CEC1302 demo.
Ensure bit 0 of the task address is clear when setting up stack of initial Cortex-M3/4/7 stacks (for strict compliance, although not practically necessary).
vTaskGetTaskInfo() changed to vTaskGetInfo() - with a macro added for backward compatibility.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2443 1d2547de-c912-0410-9cb9-b8ca96c0e9e2