Configuration output command

[kzap]

Added mkconfig command.

deploy mkconfig stage \
  --user visionmedia \
  --host server-ip-address.com \
  --repo [email protected]/visionmedia/deploy.git \
  --path /home/deploy \
  --ref origin/master \
  --post-deploy ./bin/post-deploy

[stage]
user=visionmedia
host=server-ip-address.com
[email protected]/visionmedia/deploy.git
path=/home/deploy
ref=origin/master
post_deploy=./bin/post-deploy