NEW: Began implementing control commands (if, ifelse, repeat, etc)
Merge branch 'master' of https://github.com/rosspcahoon/slogo
NEW: Implemented control commands (if, ifelse, repeat, make, to), redefined StringCommandNode to return var values in resolve if name is varname, implemented user var libraries in CommandManager to support user-defined commands, implemented user-defined command map, tested control commands some (but not extensively), TODO: implement error handling and reporting structure