* added proper exception messages for a few cases * change_link_flags will attempt to change the link flags of the state if it is in the operation queue rather than the state stack
* added proper exception messages for a few cases
* change_link_flags will attempt to change the link flags of the state if it is in
the operation queue rather than the state stack

cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala,cmbasnett/mandala