Improve grammar syntax

[mopichalova]

Order of individual sections (rules, inits, etc) is arbitrary now to allow more flexibility

• rules must be defined at least once
• each section can be defined more than once

Enforcing and accepting newlines:

• ignoring only WS_INLINE instead of all WS
• specifying where newlines are allowed

Close #93

[xtrojak]

Maybe there should be dict.update again somewhere?

[mopichalova]

Yes, dict.update solved the issue in commit 8546c4e.
Commit 1ba38d2 handles multiple regulation definitions by throwing an exception.