[Pharo-project] Issue 1058 - Merge of BlockContext and BlockClosure

http://code.google.com/p/pharo/issues/detail?id=1058 Can this two classes be merged (the share 80% or more than methods and several are identical, maybe were copied) and then (assuming that the BlockClosure will be the enduring): Smalltalk at: #BlockContext put: BlockClosure This way several packages that extend BlockContext will work in the new closure vm, for example Magma. What are the pros/cons of this change? If feasible, will be marked as Milestone-1.0?