stop drawing guides on node destruction
disallow right-click drag on ports and controls
fix #38 Overlay and canvas redraws are unsynchronized in Firefox
make base class for drawable node
implement triangle node
add basic saving/restoring by name
implement background node
add interface for hiding individual entries in picker
allow only one instance of background node
fix picker double border when functions are hidden
implement map node
prevent exception when some node fails to create
some comments for good
remove port.click event as redundand

node.click is sufficient
add getters for node position and dimensions
update settings coordinate getter
refactor basic settings bubble class
implement settings interface for number props