CodeSchool AngularJS course link correction

Corrected the AngularJS CodeSchool course link

Correct verb tense.

The noun is plural ("practices"). The verb should match ("come").

Update Marionette to not be Maroon

fix link to app spec in index.html

Add prefixfree and adjust CSS

With prefixfree you don't need a devserver or anything to get the same look as
in the version built with gulp.

Changed `columns` to `column-count` to counter prefixfree bug here due to CSS
naming weirdness: https://github.com/LeaVerou/prefixfree/issues/54

fix links to app-spec.md

and "template/".

The rest of the gh-pages links look okay.

Gulp build chain

Fix #972

The script is going to build `master` with `gulp` on every push and, if
successful, push the resulting `dist/` to `gh-pages`.

Yay, autoprefixer!

Based on Web Starter Kit

removes uncessary pragma - react

React - Unused element footer#info

React comments - limit to 80 columns

Issue 952: fix styling for all/active/completed buttons