Use on[focus|blur] capturing instead of DOMFocus[In|Out]
Various fixes to get the demo working in Firefox
Replaces some symbol keys with more common ones
Improves backspace support (fixes older Samsungs)

Fixes backspace in Firefox too, as a bonus.
Add mappings for LG and Samsung TV remotes
Changed special key icons for better device support
Adds config option for timeout on long key presses
Improves tab key functionality
Ignore keyup if no keys are focused
Dispatches hide/show events, delays hiding until thread is idle
Resets focused key on hide
Set default font-family to sans-serif
Use normal font weight for keys
Modified the demo to use the Fira Sans font
New sections for the README, updated screenshot
Moves vertical key focus more intuitively

The horizontal direction the user is moving in is now taken into account
to take a better guess at the key they intend to move to when pressing a
vertical direction.
Removes some unused variables (housekeeping)
Minified build and version bump to v0.0.2