cAdd an explicit CompiledNode structure

Hello @eford1, 

Please review the following commits I made in branch 'nick-compiled-node2'.

ead787a6ddb75451fe1e9c0d0d3f7617b0c4bcad (2013-07-09 17:26:54 -0400)
Move things into CompiledNode methods


R=@eford1