fixed get_current_scene, added reftrack attr
added namespace attribute and parent attribute
implementation of the refobjinterface
added asset node, replace for nested references restricted
asset transform node, common lib added with context managers
resturctured reftrack, implemented reference
implemented asset reftype interface
added first tests for refobjinter
fixed set parent, test for get children
fixes and tests for delete refobj, referenced_by, get_all_refobjs
test for get and set reference
test for get_status and connect_scene node
more tests for refobjinter
changed structure of test. refrack test in seperate folder with own conftest
test fixture for assettypeinterface
tests and fixes for asset reference command
group content function, test for load and unload
test and fix for import reference
test for import
Merge branch 'feature/JP-115-reftrack' into dev