Added ApiOption overloads to methods on IRepositoryCommitsClient (#1247)

* Added ApiOptions overloads for RepositoryCommitClient methods

* Added overloads to Reactive clients

* Integration tests in progress

* Integration test addition in progress

* More integration tests added

* Added Ensure things

* Minor changes

* Minor changes

* Few changes

* Tried to fix errors

* Tried to fix errors

* Fixed a few things

* Fixed integration tests

* Tidying up

* Added public keyword

* Added unit tests for GetAll() in normal and reactive methods

* Minor changes

* Changed the class name

* Fixed the unit test

Octokit.Tests.Integration/Octokit.Tests.Integration.csproj

@@ -137,6 +137,7 @@
     <Compile Include="Reactive\Enterprise\ObservableEnterpriseLicenseClientTests.cs" />
     <Compile Include="Reactive\Enterprise\ObservableEnterpriseSearchIndexingClientTests.cs" />
     <Compile Include="Reactive\Enterprise\ObservableEnterpriseOrganizationClientTests.cs" />
+    <Compile Include="Reactive\ObservableRepositoryDeployKeysClientTests.cs" />
     <Compile Include="Reactive\ObservableAssigneesClientTests.cs" />
     <Compile Include="Reactive\ObservableAuthorizationsClientTests.cs" />
     <Compile Include="Reactive\ObservableEventsClientTests.cs" />
@@ -151,7 +152,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Helper.cs" />
     <Compile Include="Clients\UsersClientTests.cs" />
-    <Compile Include="Reactive\ObservableRepositoryDeployKeysClientTests.cs" />
+    <Compile Include="Reactive\ObservableRepositoryCommitsClientTests.cs" />
     <Compile Include="Reactive\ObservableUserAdministrationClientTests.cs" />
     <Compile Include="Reactive\ObservableUserEmailsClientTests.cs" />
     <Compile Include="Reactive\ObservableTeamsClientTests.cs" />