HTML5/D3: #50 Defaults for unknown devices

1. Drilldowns and popovers match device categories for new, unknown
device types.
2. Removed “Coming…” popover banners in anticipation of completing
known popovers.
add 'cron reboot'
not quite yet
new parrot flower power SVG #20
HTML5/D3: Tuesday updates

1. All errors in response to commands to steward displayed to user. May
address #35.
2. Center home screen category icons (yay!). #27 and #62.
continue work on basic apprentice engine
WeatherStationXBeeWiFi
Writing documentation for XBee WiFi example
Modified documentation
Modified
Modified
Modified
Modified
Modified
Modified
Modified
Modified
Delete d3-1png.png

Naming incorrect.
Fixed http to https
Merge branch 'master' of https://github.com/TheThingSystem/steward