Add all fonts to `web_accessible_resources`, run `content_scripts` at `document_start`

Chrome 32 beta issue solved by explicitly telling it to load all fonts in `font/`.
The main content scripts now run as soon as possibile, without waiting for the page to load.
Added `itasaplusplus` to the `html` tag as soon as possible, so we don't clash with other styles.
Set menu arrows to look like Holo Spinners
Million dollar fix
Yet another amazing fix for ya kitkat lovers
Fixes for KitKat, manifest updated
Merge branch 'kitkat' of github.com:frakbot/italiansubs-plus-plus into kitkat

Conflicts:
	italiansubs-plus-plus/css/plus-kitkat.css
	italiansubs-plus-plus/manifest.json
Stuff. Again.
Merge branch 'kitkat' of github.com:frakbot/italiansubs-plus-plus into kitkat
Fix for alternate backgrounds, automatic `top` for autocomplete
Fix spinner indicator `:hover` issue

One liner. Rock 'n roll.
Updated menu arrow :hover color
Minor fix for KitKat issue with Better ItaSA
Merge branch 'kitkat' into gruntify
Grunt and SCSS

Use `grunt build` to build a dist of the project, `grunt try` to continuously compile SCSS into CSS
(maybe to try that in Chrome).
All of the CSS files (but KitKat) have been turned into CSS.
Ignore incremental version numbers, that will be fixed asap.
Complete Grunt-ification