Adding ability to --force npm install.

This is required because we need a way to re-read the package.json file to pick up dependency changes.

Signed-off-by: Eric Richmond <ericr@indabamusic.com>
from force to npmforce

Signed-off-by: Eric Richmond <ericr@indabamusic.com>
Merge pull request #11 from indabamusic/add_force_to_deploy

Adding ability to --force npm install.