high level models now have a `GetOperations() map[string]*Operation` method available on `PathItem`.
Requested by @TristanSpeakEasy in #19
gofmt is doing some strange things, must be a mac/windows issue as I swap machines about.
3.0 and 2.0 do not work, there are multiple versions and anything with a period in it sucks from my point of view, v2 and v3 feel much better from a DX perspective.
