* Add convention test to ensure 'Url' properties are of type string
Closes#1582
* Change 'Url' properties from Uri to string
Global Find/Replace FTW!
* fix compilation errors in the integration tests project
* Extend 'Url' properties type check to request models
* Stick to convention tests naming convention
* Remove unused using directives in models
Changing from `Uri` to `string` means the `using System;`
directive was not needed anymore in some files
* Update exception message wording
* empty commit to trigger a new build - hopefully Travis passes
* add convention test to ensure request models have Uri 'Url' properties
* make request models 'Url' properties Uri
fix typo in convention test name
* revert some request models 'Url' properties as `string`
see https://github.com/octokit/octokit.net/pull/1585#issuecomment-297186728
* Change test so that all model types must have 'Url' properties of type string
- Filter test input to only get types which have 'Url' properties
- Merge response and request model types tests into one
- Unparameterize the exception since we only check for the string type now
* Fix string.Format tokens
If this PR doesn't get rebased, it'll be my wall of shame FOREVER!
* and then it's even more embarrassing when the commit message says rebased but you really meant squashed
* Remove exclusion of `Release` from request models
Mickaël Derriey