Update Angular dependency to ~1.3.0, update html5-boilerplate, karma

[pedrosanta]

I think angular-seed project should always be updated with the latest stable version of Angular as a dependency, so I've updated the dependency version to ~1.3.0 (similar and to be consistent with what's suggested on the tutorial) on bower.json.

Fixes #259.

Additionally, I've updated the html5-boilerplate dependency to the latest version and updated the src of scripts/css on index.html.

I was also running into issues on npm install and updated karma to the latest version as well, and added all the needed karma plugins. (I think this may also solve other npm install issues such as #271, #270, #266, #263 and #262.)

I've checked the migration guide but no change to the code was needed. I've tested the seed project with this new version and have run all the tests successfully.

[petebacondarwin]

Landed this update to angular (1.4), karma, html-boilerplate and also protractor.
Thanks

[pedrosanta]

Cool @petebacondarwin. Didn't knew that "~1.4.0" was already stable, the https://angularjs.org page misled me. :)

Going to keep more attention to changelog and blog for this.

[petebacondarwin]

We should update the homepage