replace canvas with svg
dashed line for message
arrow head with `polygon`
change dasharray of creation message
style creation message
calibrate arrow head
self message in svg
extract a function
correct head of return message
use svg for actor
drop shadow filter (slightly ugly...)
slight shadow
svg g
good drop shadow
lighten shadow
canvas to svg for view, controller and entity
obsolete filter definition
works on jasmine-node
extract a func
rewrite relation with svg