parser: Value->Val
parser: more renames
parser: macro-ise strings

Also grouped functions that are meant to satisfy interfaces close to
those interfaces.
parser: standardadize on naming of dummy functions
parser: DDL.Action int -> string
parser: more macro-isation of strings
parser: add basic benchmarks
parser: removed panic error hadling from token.go
parser: all references to Node replaced
parser: RIP Node!
parser: files renamed.
parser: cosmetic changes