Fixed OpenTherm relaying, added Velbus device icons and only relay data if client is connected for OpenTherm, Velbus and RfxComtrx
Added Velbus device icons
Merge branch 'beta' of https://github.com/BreFra/DomotiGa into beta
Fixed OpenTherm relaying and improved OpenTherm & Velbus so data is only send if a relay client is connected.
Merge branch 'beta' of https://github.com/brefra/DomotiGa into brefra-beta

Conflicts:
	DomotiGa3.gambas
	DomotiGaServer3.gambas
Merge branch 'brefra-beta' into beta