Update README.md

Added another link to the Scopes section
Merge pull request #20 from ajkerrigan/master

Added AngularJS+SignalR links
Adding article about the dependency injection

Explain the different methods to use the dependency injection in Angular
Merge pull request #21 from diestrin/master

Adding a post about dependency injection
Russian version
Spacing fix
feature/ES-ES add ES-ES.md and first resources
Merge pull request #24 from acido69/feature/ES-ES

feature/ES-ES add ES-ES.md and first resources
Merge pull request #23 from komrade/master

Russian version
Update README.md

Add tutsplus article
Merge pull request #25 from pyprism/patch-1

Update README.md
adding frontend workflows with grunt and angular video
Merge pull request #26 from davemo/master

Adds "Frontend Workflows with Grunt and AngularJS"
DE-DE AngularJS + CoffeeScript - der einfachste Weg zu elegantem Code
DE-De AngularJS Buch von Robin Böhm und Philipp Tarasiewicz
Merge pull request #27 from robinboehm/patch-1

DE-DE AngularJS + CoffeeScript - der einfachste Weg zu elegantem Code
Merge pull request #33 from robinboehm/patch-7

DE-De AngularJS Buch von Robin Böhm und Philipp Tarasiewicz
Added egghead.io source code repo
Merge pull request #34 from msfrisbie/master

Added source code for egghead.io videos
Update README.md

Back from vacation, so updates should now resume. Added several new links, and also added some new categories.