Use std::queue instead of a manually handled list
Suppress no real value change notifications
Remove messages indicating missing features
Add node attribute accessors
Add Node#inspect
Add value attribute accessors
Add node management in ruby
Add license file (GPLv3)
Remove Node#level= c implementation
Set node level directly via the Level value
Add Value#command_class
Remove unused variable
Return a symbol describing the value's type
Cleanup Value#inspect
Change dummy method parameter name
Add Value#genre
Move Node#on! / Node#off! into Ruby code
Enhance readme text
Add some real examples to usage.rb