Moved classes out of Rest.cs into their own files.

TShockAPI/Rest/RestVerbs.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+
+namespace Rests
+{
+    public class RestVerbs : Dictionary<string, string>
+    {
+        /// <summary>
+        /// Gets value safely, if it does not exist, return null. Sets/Adds value safely, if null it will remove.
+        /// </summary>
+        /// <param name="key"></param>
+        /// <param name="value"></param>
+        /// <returns>Returns null if key does not exist.</returns>
+        public new string this[string key]
+        {
+            get
+            {
+                string ret;
+                if (TryGetValue(key, out ret))
+                    return ret;
+                return null;
+            }
+            set
+            {
+                if (!ContainsKey(key))
+                {
+                    if (value == null)
+                        return;
+                    Add(key, value);
+                }
+                else
+                {
+                    if (value != null)
+                        base[key] = value;
+                    else
+                        Remove(key);
+                }
+            }
+        }
+    }
+}