add license

diff --git a/oUF_RaidDebuffs.lua b/oUF_RaidDebuffs.lua
index f9c527b..a23277f 100644
--- a/oUF_RaidDebuffs.lua
+++ b/oUF_RaidDebuffs.lua
@@ -3,6 +3,28 @@
     Raid debuff mod for oUF

     === License ===
+    Copyright (c) 2010 yaroot(@gmail.com)
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use,
+    copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following
+    conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+    OTHER DEALINGS IN THE SOFTWARE.
 --]]

 local _, ns = ...
@@ -212,3 +234,4 @@ local function Disable(self)
 end

 oUF:AddElement('RaidDebuffs', Update, Enable, Disable)
+