added IterBytes for 4-tuples
marking on both input and output from macros. nice shiny new test case framework
add test case for macro token comparison
make comparison of special_idents non-hygienic
comments
add temporarily unused ctxt field to mac_invoc_tt
WIP
WIP: adding context to macros
add fold_mac field to fold.rs
add fold_mac clause to fun_to_ctxt_folder
capturing macros now implemented
comments
remove dead code