Adding Uber as a sample

Still needs `security` bits added, but this is a solid start.
Added "file" to the parameter types.
Added several new objects

Paths Object
Path Item Object
Operation Object
External Documentation Object
Parameter Object
Merge pull request #110 from earth2marsh/patch-4

Adding Uber as a sample
Added additional sections

Tag Object
Responses Object
Response Object
Serializable Type Object
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Additional validation restrictions.
Merge remote-tracking branch 'upstream/master'
updated per #107