Add LLVM flags to Rakefile; Spike code generator class
add example material to scratch folder
Node::getInput() and ::getApplicator() return pointers
Remove NodeDoesNotExist exception
Remove ParseError and ParenthesesDoNotMatch
add main function to codegen.cpp
codegen executable is buildable in rake
move executables to bin/
begin writing llvm ir code for the apply function
Begin implementing list length function in scratch.ll
finish list length function
move length function to top of file
change llvm headers to reflect latest version of llvm
Implement push function for adding an item to a list
create function to initialize empty argument list
reset main function
create argList factory function; change signatures of @I and @K; try storing and calling function pointers in fcf struct
create setArity function
create (untested) evaluate function
create (untested) apply function