Make plugin id clearer in --help for plugman info

close #79
Update dependencies in package.json

Updated everything shown as outdated by `npm outdated --depth=0`
(except npm, too early for npm 2.x).
Fix outdated plugin id in help.txt
CB-7915 - Added tests for nopt
CB-7915 - Upgrading "nopt" to 3.0.1 breaks plugman interface (revert back to 1.0.9)
CB-7894 - Updated docs (closes #80)

Removed --uninstall, added docs for owner and some other cleanups

Signed-off-by: Shazron Abdullah <shazron@apache.org>