servioticy plugin - rename icon -> icons as required in Node-RED
servioticy plugin - fix header, remove unused pusher.js information
servioticy plugin - make also "lastUpdate" dynamically assignable

This is useful for synchronisation between different data sources.
servioticy plugin - catch errors on JSON parse (HTTP EOF for instance)
servioticy/plugin - catch more error situations
servioticy plugin - HTTP error handling
Philips hue plugin - fix broken doc links
Philips hue plugin - don't crash Node-RED on illegal RGB HEX values
Merge pull request #5 from mwallnoefer/master

other improvements