Adds Advanced configure tab

- Adds Hide Bottom Scrollbar option
- Adds on/off switch directive
- Fixes Tile Editor bug in the background tab
Extends on/off switch to entire options window

- Updates button style
Show/Hide grid bugfix
Optimizes recent changes for About window
i18n update: http://crowdin.net/project/antp/
Optimizes Options window

- Also fixes ANTP-74
- Various other fixes
- Introduces new preference utility class
Fixes indenting here and there
Adds customizable grid sizes to Advanced config

- Fixes tiny bug in common.js
Fixes bugs

- Incorrect min value
- Didn't allow null value
Adds new i18n strings
Adds new CWS 'Rate' button to About window
Removes Flattr
Version bump
Merge pull request #54 from NewTabPage/dev

Release