suppress this constant RVM checks if QUIET environment variables is set.

latest versions of capistrano are so slow that these redundant checks add lots of time to deploys and are only necessary for debugging.

maybe there's a more cap-fu way to suppress them; but for me they run for every deploy and invoke target.

it doesn't help that EACH  cap execute command run in its own sshkit session .... grind, wait, yawn.
use semi mysterious log level to suppress these checks

use as yet undocumented capistrano feature to suppress these checks ; aka the "log_level"
Merge pull request #42 from bretweinraub/master

suppress this constant RVM checks if QUIET environment variables is set.