Add something like -o / --output, to control where output goes. (Instead of just assetviz.html.
I was considering default output to stdout, but decided against it since it seems very few web developers are used to lowlevel unix tools.
But maybe I should do that afterall if there is also an -o switch
I rather feel the trend is going towards not spewing massive amounts of machine-designated output to peoples terminals.
I.e. making -o/--ouput mandatory, but allowing it to be set to - for stdout.
Added --output switch to define output filename. '-' pipes output to …
…console. Default to './assetviz.html' if undefined. Closes #2