IEP-50 Thin Client Continuous Queries

[Pavel Tupitsyn]

Igniters,

Let's discuss Thin Client Continuous Queries,
I've prepared an IEP [1] and a PoC [2].

[1]
https://cwiki.apache.org/confluence/display/IGNITE/IEP-50%3A+Thin+Client+Continuous+Queries

[2] https://github.com/apache/ignite/pull/7966