ported virtual device setup to metro ui as well
added function to get graph data
prepared tile click handler for different tile types
added highcharts js
first attempt at charts
some improvements in charts
power and enrgy graphs mostly functional
code indentation
notification modal corrections
added temp chart
optimized the refresh loop
solved bug in refresh tab
solved issue with scene and device mixup in virtual device
use grep instead of foreach
added group tile for security
Merge pull request #13 from sdh16/develop

Merge changes from develop branch - general code improvements and optimisations