Nil RTOS update - Fast and Tiny!

Development Libraries
5

I've been trying to decrease the stacks - see the actual usage when call them (a "CLI" task signals to few other tasks to execute some commands (set blink h/l period, analog in/out, show stack usage):

PITO>
PITO> stack
STACK
Stack Sizes: 133 133 85 85 85 85 117 14795
Unused Stack: 35 94 71 73 71 71 103 14747
PITO> period 40 40
PERIOD 40 40
PITO> aout 14 200
AOUT 14 200
PITO> ain 3
AIN 3
190
PITO> stack
STACK
Stack Sizes: 133 133 85 85 85 85 117 14795
Unused Stack: 27 39 71 73 71 71 19 14747
PITO>

Some tasks are set to 16 (85 ones).