Feature/streamline plugins (#45)

* Moved computed plugin into the core library

* Merged the ReactiveSystems plugin into core

* Moved the tests around

* Bumped to version 8

Another bump to Nugets

Bumping SystemsRx dependencies

Added extra extension method for blueprints on entity creation

Bumped to 7.2 not 7.1

Bumping SystemsRx dependencies

Added some extra extension methods to populate components directly fr…

…om groups

Merge pull request #42 from thejayman/master

Fixed ComputedGroup refresh firing unecessary remove events

Added defaults to transform components

Bumping to latest SystemsRx