Updates to docs, Changelog, etc for 0.2.0
release.

Includes and updated Changelog, update the install.yaml
to rc version, and updates for the docs for release.

Moved the installation documentation into the `install` directory
and on release, zip up the install instructions and yaml files
such that users can download and use them.

When the template for a Fleet is edited,
a deployment strategy can be defined. At the
moment, this is just the `Replace` strategy, which
terminates all current non-allocated GameServers
and immeadiately starts up new GameServers to replace
them.

Includes documentation as well.

This implements the FleetAllocation CRD, that when created
looks at the requested Fleet, and marks one of the
GameServers as Allocated (if available) and returns it's value
in the FleetAllocation.

This also includes a quickstart and spec for reference as well.

Some refactoring was included in the PR (probably should have been
a seperate PR for that).