Feature: multiple deploys

Basically "meteor" as application name is now configurable through an "appName" variable on mup.json.
for example: if "appName" has "todo" as value, we would end up with:
application deployed at: /opt/todo/app
upstart config file: /etc/init/todo.conf so we can do start todo | stop todo
default mongo database: todo

If the "appName" attribute is not set, then the default value would be "meteor" leaving the functionality as it was before.