Update dependencies with missing ones (Fix #237)

[SBoudrias]

There was some missing dependencies, and some weirdness in the
package.json. This should be fixed. Bower and grunt-cli have been moved
back to the peerDependencies; if running on travis-CI or similar and
having issues, you should install those two in the pre-build script.

I send a PR because I'm unsure why/how the package.json file have reach the previous state.

[tbranyen]

What dependencies are missing? Why are we using peerDependencies other than the semantic value? From what I can tell they don't install or affect anything unless you're installing Backbone Boilerplate through NPM (the generator is the only thing that does this).

devDependencies seems to be the appropriate location for grunt-cli and bower. They are development dependencies and npm's scripts object will put them in the path suitable for CI. The other dependencies you're adding should be covered by the bbb package which has peerDependencies set to grunt-bbb-* tasks.

[SBoudrias]

@tbranyen Apparently, the bbb package wasn't enough for #237, and the local installation of grunt-cli was bringing up errors.

peerDependencies are always installed globally and does not enforce a version, not devDependencies. But I changed them mostly because of the issue @RichardCheung had on #237.

[tbranyen]

It's because of the brittle nature of load-grunt-tasks. It doesn't check node_modules, instead it checks your package.json.

[SBoudrias]

Yup, I think though a fix in load-grunt-task to skip grunt-cli should be ok.

I don't see much advantages to declaring bbb in package.json instead of each grunt-bbb-*. load-grunt-task really ease-up the Gruntfile, I think it should stay if we only encounter those minor problems.

BTW, I'm not sure I see where you'd need to install bower/grunt-cli locally?

[coveralls]

Coverage remained the same when pulling 8605b7c on SBoudrias:master into 2750f9f on backbone-boilerplate:master.

[tbranyen]

@SBoudrias I posed the question to @cowboy about this and I'd like to follow his advice on how to structure the Gruntfile.

For reference: cowboy/wesbos#5

[tbranyen]

Fixed the package.json via: c73b22e

This updates the .travis.yml file to automatically install the correct dependencies exactly per the Markdown.

[tbranyen]

Integrated your changes here: be559d0...0ea0358

[SBoudrias]

That looks good to me