SLI | Code / MxGraphModel

Planning

 Factor list   (cell array)
 Vacant list   (stack: vector + scalar)
 Variables & dimensions somehow
 Variable adjacency (cell array)

 Factor()                              // blank constructor

 FL[3] *= 2.2 (?) -- should this change the matlab factor or not? (it does; good?)
 msg[i,j] = newmsg -- this needs to, but can call "set"...

mex::set<T>

 copy the vector toolkit, but with set operations
 add equal operator for matlab 
 extensible to Variables class? (dimensions?)
   probably not (probably need code repetition)?

cellVector

 just the vector toolkit, but with cells? 
 Is it necessary?  Or can I just use the vector class somehow?