Filter feature, output startup fix

• added filter option for wirenboard-in node, works the same as filter node;
• output startup ignores initial (null) message from wirenboard on serial reload;
• server node parses new meta info: control_meta and device_meta;

Messaging improvement, mata info

1. added msg.change: old, new, updated_at
2. added timestamp in node.status
3. added msg.meta, now it updates
4. added msg.error, internal var , if there is no connection with device more than 1 minute

Multi devices

1. wb-get - now you can chose several channels, check msg. there is msg.math with average, sum, min, max values.
   wb-out - multi channels to send command.

2. button events improved

Motor node, button improvements

1. motor node for all kind of motors
2. button node changes: dimming function, toggle, msg.event instead of msg.payload

Major update, breaking changes!

Export all flows, find and replace

wb-output -> wirenboard-out
wb-input -> wirenboard-in
wb-server -> wirenboard-server
wb-get -> wirenboard-get
wb-button -> wirenboard-button
"filter":"/dev -> "channel":"/dev
"url":" -> "host":"

Import

v0.6.2

• Support of readonly devices

v0.4.0

The first stable release