streaming-wc-l helper
add tons of improvements to streaming-wc-l

* “print strategies”:
    * “linear”: print every Nth number
	* “geometric”: print every power of a number
	* “decimal”: print 1, 2, and 5 times powers of 10
	* “round”: print integers of the form m * 10^n where m < 10.
	* “fibonacci”
* optionally print timestamps with each status
* optionally “append” all statuses, rather than overwrite them in place
* optionally print “rates” of line consumption (default: true)
streaming wc-l with intervals!