change attribute access shorthand in Component to return the value directly, not the Attribute object
todo note about Attribute validation (currently there is none)
port tests to the new comp.attr for direct value getting system. NOTE: some of the test codes gets Attribute objects from the attributes array and there the .value getter is still used, as intended.
port EC_Placeable parent waiting code to the new attrval getting
port app test and ThreeView code to the new attrval getting
fix placeable parent check after attrval change
attrval change: modify also DynamicComponent attrs to use the new system
Merge pull request #5 from playsign/attrval

change attribute value access from ent.comp.attr.value to ent.comp.attr directly