openjpeg: Add copyright and license comment

See this discussion:
moravianlibrary/iipsrv-openjpeg#1

Signed-off-by: Stefan Weil <sw@weilnetz.de>

src/OpenJPEGImage.cc

@@ -1,3 +1,21 @@
+/*  IIP Server: OpenJPEG JPEG2000 handler
+
+    Copyright (C) 2015 Moravian Library in Brno (http://www.mzk.cz/)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 //#define DEBUG 1
 
 #include "OpenJPEGImage.h"

src/OpenJPEGImage.h

@@ -1,3 +1,21 @@
+/*  IIP Server: OpenJPEG JPEG2000 handler
+
+    Copyright (C) 2015 Moravian Library in Brno (http://www.mzk.cz/)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifndef _OPENJPEGIMAGE_H
 #define _OPENJPEGIMAGE_H