Adding configuration files
Support for events and configuration

This add support to detect 3 button events and send a post to
artoo api to publish a ‘button’ event:

data contains: ‘up’, ‘select’ or ‘down’ depending on which button
was pushed.

This also adds configuration options saved in localStorage to avoid
having hardcoded data into application code.
Updating documentation with newest changes
Merge pull request #2 from hybridgroup/107-support-for-events

Adding support for button events and configuration screen