HotSensors: added temperature monitor stubs.
Tools: updated generator script.
HotSensors: query & keep the sensors.
HotSensors: moved Readings to structures, emit them.
HotSensors: added HistoryManager.
Merge branch 'master' of github.com:0xd34df00d/leechcraft
HotSensors: added PlotManager.
HotSensors: instantiate PlotManager & signals.
HotSensors: data model & image provider.
HotSensors: provide a quark.