Added support for Identification and Location of anchors and actions.
Set different identifier types for accessors and filters.
Avoiding awkward space from printing ''
Mending tests to work with identifications
Merge branch 'idloc'
Cleaning up error reporting. Added --debug flag.
Adjusting thrown exceptions in tests. Not using KeyError anymore since
it quotes the message.
Added tests for identification and location.
Merge branch 'idloc'