update NOTICE file

add webhook for slack notification of PR results

Add the NOTICE file

Use actionproxy from dockerSkeleton do not clown and own is the motto FTW!

Update README.md

Fix typos

* Use akka distributed map to store the shared state

* Join seed nodes in the load balancer service

* Add optional auto-down-unreachable-after

* Local bookkeeping is used by default

* Update documentation

Formats all .scala files according to `scalafmt`'s (opinionated) style. 
Adds Travis checks for correctly formatted code.

Using `object`s instead of a hollow class as the "factory" for an Spi makes them being singleton by default, which reduces boilerplate to implement an Spi.

The `Dependencies` object is not used anywhere and there might be better alternatives which we can decide on once the need of them comes up. For now, the Spi's interfaces are relatively tightly coupled to their current default implementations anyway.

Also updated documentation.

- Refactoring the invoker for better encapsulation and separation of concerns in its packages.
- Removing Dispatcher.
- Remove unused properties from the deployment manifests.
- Add error handling for terminal failures

Refer to https://docs.gradle.org/current/release-notes.html for the full release notes.

- Zinc updated (incremental Scala compiler)
- Better logging for parallel tasks (useful locally when working with redo)
- Build cache improvements

This version contains important fixes to limit the number of connections made during bootstrapping

* Port Controller from Spray to Akka
* Increase max-connections and Update JSON Unmarshaller

Adds the ability to add pluggable implementations for defined Service Provider Interfaces (SPI). The implementation to load is chosen via configuration.

First set of plug-points are:
- ArtifactStoreProvider
- MessagingProvider

This allows actions to set/retrieve global variables as an additional optimization during container reuse.

* rename namespace to global_context