move an attribute in Wonderswan core that was on the constructor on accident, added an AttributeTargets attribute on it that would have caught such an error, add AttributeTargets on some other attributes to help clarify their usage

BizHawk.Client.Common/lua/LuaAttributes.cs

@@ -2,6 +2,7 @@
 
 namespace BizHawk.Client.Common
 {
+	[AttributeUsage(AttributeTargets.Method)]
 	public class LuaMethodAttributes : Attribute
 	{
 		public LuaMethodAttributes(string name, string description)
@@ -14,6 +15,7 @@ namespace BizHawk.Client.Common
 		public string Description { get; set; }
 	}
 
+	[AttributeUsage(AttributeTargets.Class)]
 	public class LuaLibraryAttributes : Attribute
 	{
 		public LuaLibraryAttributes(bool released)

BizHawk.Emulation.Common/CoreAttributes.cs

@@ -2,6 +2,7 @@
 
 namespace BizHawk.Emulation.Common
 {
+	[AttributeUsage(AttributeTargets.Class)]
 	public class CoreAttributes : Attribute
 	{
 		public CoreAttributes(

BizHawk.Emulation.Common/Interfaces/IEmulatorService.cs

@@ -22,6 +22,7 @@ namespace BizHawk.Emulation.Common
 		public FeatureNotImplemented() { }
 	}
 
+	[AttributeUsage(AttributeTargets.Class)]
 	public class ServiceNotApplicable : Attribute
 	{
 		public ServiceNotApplicable(params Type[] types)

BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.cs

@@ -12,6 +12,7 @@ using System.Runtime.InteropServices;
 namespace BizHawk.Emulation.Cores.WonderSwan
 {
 	[CoreAttributes("Cygne/Mednafen", "Dox", true, true, "0.9.36.5", "http://mednafen.sourceforge.net/")]
+	[ServiceNotApplicable(typeof(IDriveLight))]
 	public class WonderSwan : IEmulator, IVideoProvider, ISyncSoundProvider, IMemoryDomains, ISaveRam, IStatable,
 		IInputPollable, IDebuggable, ISettable<WonderSwan.Settings, WonderSwan.SyncSettings>
 	{
@@ -87,7 +88,6 @@ namespace BizHawk.Emulation.Cores.WonderSwan
 		#endregion
 
 		[CoreConstructor("WSWAN")]
-		[ServiceNotApplicable(typeof(IDriveLight))]
 		public WonderSwan(CoreComm comm, byte[] file, bool deterministic, object Settings, object SyncSettings)
 		{
 			ServiceProvider = new BasicServiceProvider(this);