author Jim Conner <snafu.x@gmail.com> 1559884909 -0700
committer Jim Conner <snafu.x@gmail.com> 1560547939 -0700

Implement pools
Fixed Pool method to return nil if non-existent. Fixed schema type in return of pool to machine.
Added pool_test
Fixed most of the issues requested in PR#79. There are few left.