custom linting

[akosyakov]

Some repetitive issues which could be automated:

• ts code should only use code from declared dependencies or transitive dependencies - [quality] Implement a custom tslint rule to check imports #467
• file naming, should be named after a type in the file, a rule should allow excluding with regex pattern, i.e. *-protocol.ts, objects.ts, types.ts, etc.
• declaration of dev dependencies, should go to the root package or the ext script package
• empty files
• public functions and variables without namespaces, should usually belong to namespace of class using it
• return types should not be inferred for public functions