P8P67 REV 3.1 support

.gitignore

@@ -1,4 +1,5 @@
 *.user
 *.suo
 /Bin
-/Obj
+/Obj
+.vs/OpenHardwareMonitor/v15/TabsStudio.marker.tss

Hardware/Mainboard/Identification.cs

@@ -93,6 +93,7 @@ namespace OpenHardwareMonitor.Hardware.Mainboard {
         case "P6X58D-E":
           return Model.P6X58D_E;
         case "P8P67":
+        case "P8P67 REV 3.1":
           return Model.P8P67;
         case "P8P67 EVO":
           return Model.P8P67_EVO;

Properties/AssemblyLibInfo.cs

@@ -10,6 +10,7 @@
 
 using System;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 [assembly: AssemblyTitle("Open Hardware Monitor Library")]
@@ -24,3 +25,4 @@ using System.Runtime.InteropServices;
 [assembly: ComVisible(false)]
 [assembly: CLSCompliant(true)]
 
+