fixed query help (show -> visible)
removed useless flash messages, fixed 2D preview in set view
Some refactoring, context DataTable, selection improvements

* js -> coffee conversion
* moved coffee code from datatable script macro to own datalist module
* contextlist uses standard dataTables initialization now
** now with filter, sorting and pagination
* clicking on links doesn't select the row anymore
* selection in data list uses new selection method like query hist now
queries were not saved, wrong line was commented out...
color marker after navlinks (closes #47), different flot colors (closes #44)

* Important navigation links end with a colored marker (run query, show
* set, data and entries)
* removed unused templates
* fixed settable view
* flot uses different colors for different plots now
* test cookie reading with flask
fixed click handlers for query actions, delete, rename, toggle works again