Initial commit of changes for 1.2.3. This includes:

- Scripting support: Allows for recording and playback of mouse/keyboard input and various system control actions.  Simple (i.e. basic) scripting format.

- Fix for stale packets left in ethernet input queue; packets received by pcap while Alto's receiver is off are discarded.

- Mouse input made more accurate, and tweaked to avoid Alto microcode bug that causes erroneous mouse inputs under very rare circumstances on real hardware, but much more frequently under emulation.

- Small code cleanup here and there.  Moved many UI strings to resources, many more to go.

Contralto/Scripting/DebuggerAttributes.cs

@@ -0,0 +1,64 @@
+/*  
+    This file is part of ContrAlto.
+
+    ContrAlto is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    ContrAlto is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with ContrAlto.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+using System;
+
+namespace Contralto.Scripting
+
+{   
+    public class DebuggerFunction : Attribute
+    {
+        public DebuggerFunction(string commandName)
+        {
+            _commandName = commandName;
+            _usage = "<No help available>";
+        }
+
+        public DebuggerFunction(string commandName, string description)
+        {
+            _commandName = commandName;
+            _description = description;
+        }
+
+        public DebuggerFunction(string commandName, string description, string usage)
+        {
+            _commandName = commandName;
+            _description = description;
+            _usage = usage;
+        }
+
+        public string CommandName
+        {
+            get { return _commandName; }
+        }
+
+        public string Usage
+        {
+            get { return _usage; }
+        }
+
+        public string Description
+        {
+            get { return _description; }
+        }
+
+        private string _commandName;
+        private string _description;
+        private string _usage;
+    }
+}