Adding ScriptHostFactory method to builder and moving IScriptHostFactory/IScriptHost. Fixes for #496 and #497
Change type to IScriptHostFactory
Only instantiate script services / engine when needed
fixing logic and making unit test pass
Fixed some tests. More to go
Unit tests all green now
Cleaning up Contracts folder
Fixing compilation errors
Merge pull request #628 from glennblock/623

Scripting engine should not be initialized until it's necessary

Fixes #623
updated all packages except PowerArgs which has breaking changes
updated AutoFixture packages