Add ServiceManifest operation
Merge branch 'devsummit2014' of https://github.com/pheede/agsadmin-devsummit into devsummit2014

Conflicts:
	ArcGISRESTAdmin/AGSClient.cs
	ArcGISRESTAdmin/ArcGISRESTAdmin.csproj
	ArcGISRESTAdmin/Classes/ServiceManifest.cs
	ArcGISRESTAdmin/Classes/ServicesReportResponse.cs