version 1.0.5

I made some changes:

* Switched to [dotenv](https://github.com/bkeepers/dotenv) rather than relying on foreman or ENV. Magentize can now read the `.env` file directly (or combos)[https://github.com/prairie/magnetize/tree/dotenv#variable-selection]

* CLI flag: `--environment` to specify a `.env` file i.e. `--environment production` = `.env.production`

* Prompt before overwriting existing files.

* CLI switch: `--force` to overwrite without prompting.

* Some basic output to give the user feedback.

* Small refactor of the config var names to more closely match Magento.

* Removed redundant config vars.

* Small docs update.

* Added `env.sample`

* Version bumped.