Adds QueryProcessor to separate queries from Controllers

[DevJonny]

• Adds IQueryProcessor and QueryProcessor to handle executing of all queries
• Adds GetAllTeamsQuery and Handler to fetch Teams for the TeamsView

By separating out the queries from the controllers we should be able to start writing unit tests over the controllers and passing in a dummy query processor that we can check to see if a particular query was run when we needed it without having to run the query and set-up a KTContext etc.

I've used a simple static singleton to retrieve the QueryProcessor each time. Ideally we'd move this to an IoC container eventually. For now it serves it's possible.

Next step is to do something similar with the CommandHandlers so we don't need to pass in each one every time.

[jakemco]

s/gif/diff/

This is slick, I love it.

[DevJonny]

Thanks @jakemco I'll fix the conflict manually later and rebase.