Fix #454 broken feed URLs for packages with ID ending in .cs .config etc.
Fix #454 broken feed URLs for packages with ID ending in .cs .config etc.

mtian/SiteExtensionGallery,ScottShingler/NuGetGallery,grenade/NuGetGallery_download-count-patch,JetBrains/ReSharperGallery,mtian/SiteExtensionGallery,skbkontur/NuGetGallery,projectkudu/SiteExtensionGallery,grenade/NuGetGallery_download-count-patch,KuduApps/NuGetGallery,KuduApps/NuGetGallery,ScottShingler/NuGetGallery,skbkontur/NuGetGallery,KuduApps/NuGetGallery,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,KuduApps/NuGetGallery,ScottShingler/NuGetGallery,mtian/SiteExtensionGallery,JetBrains/ReSharperGallery,projectkudu/SiteExtensionGallery,JetBrains/ReSharperGallery,grenade/NuGetGallery_download-count-patch,KuduApps/NuGetGallery