Model documentation should be more detailed

[ptheunis]

Is this a BUG REPORT or FEATURE REQUEST?:

Feature request

What happened:

Had someone ask what unit size was required for doing a volume create. Documentation doesn't specifiy what unit of measurement is required to specify size. Our model documentation should have "bytes / Kilobytes / Kibibytes etcetera"

What you expected to happen:

Show the expected unit in the documentation

How to reproduce it (as minimally and precisely as possible):

http://api.openstorage.org/openstorage/index.html#!/volume/setVolume Click model and scroll to size.