allow array for classes to add or remove argument in classManip function
update merge function in util to support collation of values rather than just overwrite
improve merge api doc
code cleanup
add cssClass to collate members in type merge, so multiple types can have cssClass associated with them
add cssClass to supported values in types for Connection
add docs for clearTypes method on UIComponent
support cssClass in endpoint types
add tests for endpoint type cssClass, and improve testing of removeType. also add test for new clearTypes method.
added clearTypes method to Connection and Endpoint, and ensured toggleType/removeType clean up css classes properly.
document clearTypes method and type support for cssClass in changelog
update to latest katavorio 0.3
reinstate correct sorting for connections with continuous anchors
remove left/right anchor spec which was for testing an issue