version 0.0.2

* add support for javascript dependencies
* change dotenv api to account for the fact that thor doesn't seem
  to want to invoke two subcommands for the same command in the context
  of the setup command (that is, it won't invoke `dotenv heroku` and
  then `dotenv custom`). so just combine the two dotenv subcommands
  together. this changes the config file format a bit.