image_annotation/commit

use Y.Overlay for additional info

 applications/annotation.pl           |  1 +
 config-available/image_annotation.pl |  4 ++++
 web/css/annotation.css               |  7 +++++++
 web/js/annotation.js                 | 35 +++++++++++++++++++++++++++++++++++
 4 files changed, 27 insertions(+), 20 deletions(-)