removes Origin, moves Source to scala.meta.syntactic.parsers
temporarily removes Unquote

it's not used anywhere anyway
same about Quote
Mod.ValParam and Mod.VarParam are gone
Mod.Package is gone as well
Qual.Term and Qual.Type are gone, Qual.Super is now Term.Super
all the variety of Stmts is reduced to just Stmt, then Stmt => Stat
removes names that actually aren't names, but are just unhygienic strings
unification of parameters: just updated the spec, not implemented yet
Merge pull request #54 from xeno-by/master

partially implements tree changes necessary for the new quasiquote spec