Isolated more web usages - Membership and Request stuff

- Moved a few more files

src/Umbraco.Core/Security/IMemberUserKeyProvider.cs

@@ -0,0 +1,7 @@
+namespace Umbraco.Core.Security
+{
+    public interface IMemberUserKeyProvider
+    {
+        object GetMemberProviderUserKey();
+    }
+}

src/Umbraco.Core/Security/IPublicAccessChecker.cs

@@ -0,0 +1,7 @@
+namespace Umbraco.Web.Security
+{
+    public interface IPublicAccessChecker
+    {
+        PublicAccessStatus HasMemberAccessToContent(int publishedContentId);
+    }
+}

src/Umbraco.Core/Security/PublicAccessStatus.cs

@@ -0,0 +1,11 @@
+namespace Umbraco.Web.Security
+{
+    public enum PublicAccessStatus
+    {
+        NotLoggedIn,
+        AccessDenied,
+        NotApproved,
+        LockedOut,
+        AccessAccepted
+    }
+}