- massive change ( validate errors warrings from desktop-file-validate)

- massive change ( validate errors warrings from desktop-file-validate)
  - sed -i 's,Encoding=UTF-8,,g' *.desktop
  - sed -i "s,.png,,1" `grep -l 'Icon=[^/].*\.png' *.desktop`
  - sed -i "s,MimeType=.*,\0;,g" `grep "MimeType.*semicolon" validate |awk '{print $1}' |tr ":" " "`
  - sed -i 's,MapNotify=.*,,g' *.desktop
  - sed -i '/^$/d' *.desktop
- not all error/warrings validated

Changed files:
    chemtool.desktop -> 1.6