added getter for handlers that are dispatched on freshly populated objects
example usage of a handler that is executed when a sequence record has been created
nodes, collapsed and expanded, are now outlined using node_outline_colour instead of branch_colour
refactored to allow for :simple usage, i.e. INFO 'my message', instead of pseudo methods
removing regression test that fails because SVG output becomes different now that hash keys are returned as truly randomized. this behaviour is out of our control and this test has been moot for some time now anyway