Provide way to parse rules without the whitespace between calls/regexes

[pietervdvn]

e.g., so that localident can be written as

localIdent ::= "[a..z]" "[a..zA..Z0..9]"

Without having to worry that the parser can parse "a a" as a single localident

[pietervdvn]

• [x] Fix imports.bnf ((globalIdent "\.")* globalIdent should be without spaces)