improve README.md

-# Image Manager
+# image-manager
 
-## abstract
+Some very old PHP code intended to become an image management tool.
 
-Some very old PHP code originally intended to become an image management tool.
+## Description
 
-## requirement
+This is some php, JavaScript, etc. code. Currently this is not maintained
+actively and I have no idea if it is still working. I keep this anyway so
+that I don't loose any probably useful ideas.
 
-PHP (don't know the required version any more, but probably pre 5.0)
\ No newline at end of file
+## Requirements
+
+ * PHP (probably pre 5)
+
+## Dependencies
+
+unknown
+
+## Contributing
+
+Just email me.
+
+## License
+
+    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/>.
+
+## Author
+
+Georg Hopp <georg@steffers.org>