Unify the parser directories

[quark17]

It looks like both bsc.cparser and bsc.syntax are testing the BH/Classic parser. They should be merged into one directory.

Both bsc.bsv05 and bsc.bsv05-parse-pretty are testing the BSV parser (the latter testing the pretty-printer more than the parser). Perhaps a single bsc.parser (or bsc.syntax?) directory should be created, and under that can be both of these BSV directories along with the merged BH/Classic directory.