Add samples converted from "Scala tour"
Add presentation
Update slides with QR and Reactive notes
Add `EventStream` event
Update samples
Add Discriminated unions as messages sample
Ignore nCrunch artifacts
ping-pong initial setup
Handle and test command 'Spawn', and messages 'Neighborhood' and 'AggregationCompleted' for single cell
Switch to 'server/concurrent' GC configuration
Implement collector/coordinator actors
Merge branch 'master' of https://github.com/akimboyko/ActorBasedConcurrency

Conflicts:
	.gitignore