CLI: make show,list workflow looks better

[vancexu]

1. Add color 2. remove datetime by default, can add using -pdt (print date time) flag

[vancexu]

Change list cmd default to print one page (default 10 items)
Output in table and color

[mfateev]

I think for the list we want to print one page per default. But if flag is specified just stream all the pages (with appropriate throttling). But if someone does

cadence workflow list -m|more

then block pagination when buffer is full. See http://www.pixelbeat.org/programming/stdio_buffering/

[mfateev]

Can we use shorter timestamps by default?
For show I would include only hours and seconds by default.

[vancexu]

@mfateev I see what you mean. Note currently open/close worklfows can not be grabbed as stream, but as page.
The major difference between what you describe and my currently implementation is: you have a stream somewhere and then a "big" buffer so user can see a lot items each time they press button; but my is some number of items in one page (default 10), and user may need to press many times.
I can change the -m mode default using large page size 100, but then user cannot use their own page size (with -pagesize flag) for more mode. How does this sound to you? I personally prefer the current way

For shorter timestamps, what's your proposal? only time without date? I agree them take spaces but have not better way to deal with it.

[coveralls]

Coverage decreased (-0.5%) to 63.679% when pulling fc75eb8 on cli into bdeb6d4 on master.

[vancexu]

Add command listall, so that user can use pipe or redirect likecadence workflow listall | more