Boilerplate template organization and updated sails usage

### Boiler plate template organization
The templates were all in the `bin/boilerplates` folder and many of them had `.js` file extensions despite them being `.ejs` files.  I moved them all to the `bin/boilerplates/templates` folder and made them all have the `.ejs` extension.

### Updated sails usage
I updated the `sails` (sails usage) output with the options to run `sails lift` with `--dev` or `--prod`

Output was:
```
sails lift                       Run this Sails app (in the current dir)
```
is now:
```
sails lift                       Run this Sails app (in the current dir)
  [--dev]                        with development environment specified
  [--prod]                       with production environment specified
```