[WIP] Firefox Addon

[J3RN]

This pull request aims to convert this web app to a Firefox Addon. The majority of the 100 files changed are simply moving everything at the root directory (not including the LICENCE and README) to the ./data directory, so they can be used by the addon.

What it does now:

• Adjusts the user's settings to show this web app whenever a new window or tab is opened

  What still needs to be done:

• The URL bar still shows this ugly resource://... address, which really should be cleared
• Tests? The Firefox Addon community seems to want tests, but I'm not sure they're applicable to this.

[jakke-korpelainen]

Cool and thanks for the help! I can write some tests/asserts to the angular side. Lets sync the extension into master when its 100% complete, I create an extension-branch for it meanwhile.