core _pluginLoaded: Make addPluginPyNodes work for importing as it used to not run because it was triggered via SceneOpened instead of SceneImported.
core _pluginLoaded: Make addPluginPyNodes work for importing as it used to not run because it was triggered via SceneOpened instead of SceneImported.

NOTE: Referencing still does not work. I've added a TODO comment plus the working pieces. I'm missing an event to attach addPluginPyNodes that will work with referencing. Also it requires 2012.

Removed tests for Maya 2008 and greater as 8.5 support has been dropped for awhile and everything beyond 8.5 has these api calls with the exception of the referencing ones (commented out) but I added tests for 2012 in those cases.

juggernate/pymel,leonsooi/pymel,assumptionsoup/pymel,david-lassonde-adsk/pymel,shrtcww/pymel,juggernate/pymel,shrtcww/pymel,AtonLerin/pymel,david-lassonde-adsk/pymel,AtonLerin/pymel,assumptionsoup/pymel,leonsooi/pymel