Tabbed main panel

• Main panel now split over three tabs:
  • Controls added: point size and scaling
  • Static plots
  • About text

Minor:

• General CSS improvements, spacing tweaks
• Tweaked rangeSlider design based on skinFlat

Basic responsive design

• Separate controls optimised for mobile views and small screens
• CSS tweaks to reduce base size of control panel
• Data table processing done on server side
• Bug fixed: sticky inputSlider on chrome / webkit/blink browsers

Basic functionality implemented

Updates current map via leafletProxy, uses legends.

Demo release for shiny hosting

Shows the basic leaflet functionality via shiny but much still to implement.