Raw Query: make usage simpler and visible

[orkunkl]

Raw Query is the most efficient form of making cross contract queries, altough among community I see a tendency of using smart query when raw query can be used. Providing raw query generation helpers along the code would make raw queries promoted and increase in usage.

[orkunkl]

Actually found out the queries are provided in the helpers. But it uses Smart Query where Raw Query would do the work.

[ethanfrey]

Would this be addressed by #376 and the corresponding helper for Map?

[orkunkl]

Yes, #376 serves the same purpose