Developer page

[iBelieve]

We need a page showing how developers can build Material Design apps using Controls 2 + Fluid, with optional integrations into Liri OS. Include links to Google's Material Design spec, QtQuick and QtQuick Controls 2, plus documentation for any Liri frameworks (Fluid and any others we make).

Inspiration from other projects:

• https://elementary.io/developer
• http://developer.ubuntu.com/en/
• http://developer.apple.com/