First stab at separating compiler for different versions

.gitignore

compiler/2006/ArrayTypeRewrite.jrag

compiler/2006/CS_CodeGen.jrag

compiler/2006/C_CodeGen.jrag

compiler/2006/DeclNames.jrag

compiler/2006/ErrorCheck.jrag

compiler/2006/FlatSignature.jrag

compiler/2006/Java_CodeGen.jrag

compiler/2006/LabComm.ast

compiler/2006/LabComm.java

compiler/2006/LabCommParser.parser

compiler/2006/LabCommScanner.flex

compiler/2006/LabCommTokens.jrag

compiler/2006/NameAnalysis.jrag

compiler/2006/PrettyPrint.jrag

compiler/2006/Python_CodeGen.jrag

compiler/2006/RAPID_CodeGen.jrag

compiler/2006/Signature.jrag

compiler/2006/TypeCheck.jrag

compiler/2006/TypeReferences.jrag