espalarm Code

Interpret the node list returned after announcement. If the reply of some node doesn't arrive, then its peers will tell us about it : including node name, IP address, and if it is the weather node.

Fix bugs in button handling

More timeout configurability.
Add a node list to the node discovery reply. Example of such a new reply :
{"acknowledge":"node","oled":true,"alarm":"night","nodes":{"node.0":{"name":"prototype","ip":"1.1.1.1","weather":true}}}
This can lead to faster node discovery, especially the weather node.

Add configurable update timeout (partially for now)

Remove dead code, add comment

LoadGif : #if away some debug code.
Oled : display transparent backgrounds in the weather icon properly.

Slightly better debug text

Add a GetForegroundColour() method as well, and use it.

Clean up

Make node name appear again on screen 1.
Implement dark orange background for night.