Change template node to allow templating of any property of msg
Add more Node tests.
Refactor common log code.
Add test for the null message case.
Short circuit the null message case.
minor spelling correction
Merge pull request #262 from hindessm/improve-node-coverage

Improve red/nodes/Node.js coverage and minor refactoring
Update icon to fa icons for parser nodes and sentiment
and add fa icons to websocket
tray/catch error in Websocket node to close #264
Spelling correctin http node info, close #266