provide a schema of the genome whith the genes and their respective label.
and some controls 
 - left/right translation with a control panel
 - left/right by grabbing the paper
 - zoom in/out  with a control panel
 - zoom in/out with the mouswheel up/down
 
resize the view when the widow is resized

color each gene according to the "gene match" the gene match color chart is defined in color.css ( issue #872 )
constraint translation on Xaxis only ( issue #868 )