- Lots of updates by syncing to developments in other projects.
- Moving to a situation in which identity sets are used exclusively (i.o. identity pairs), which is more efficient, since we do not need to perform par/set conversions.

* [DEP] Added a separate file for starting in debug mode.
* [DEP] Added submodules plRdf, plTabular, plHtml, plGraphViz, plServer.
* [DEP] Rewrote load file to use the new load procedure, making use of load_project.
* [DEP] Rewrote the standalone startup file, i.e. run.
* [SC] Big sync to PLC,
* [IOTW,EXT] run_experiment/4 takes identity sets i.o. identity pairs (more efficient).
* [IOTW_IIMB,SC] Sync to updates in other modules.
* [INODE,SC] Renamed assert_inodes/4 with create_ihier/4.
* [INODE,SC] Made clear_ihiers/0 public.
* [INODE,SC] Renamed various predicates, variables.
* [INODE_EVALUATE,SC] Added options declarations, renamed variables.
* [INODE_EXPORT,SC] Renamed predicates, variables, added predicate options declarations.
* [INODE_EXPORT,SC] Updated export_ihier_as_svg/3 based on updates in other modules.
* [IOTW_IIMB,EXT] Now the predicate that calls run_experiment/4 has to ensure there are no singleton identity sets.
* [IOTW,DOC] Documented what happens if singleton identity sets are passed on.
* [IOTW,DOC] Documented that the conversion pairs1 -> set -> pairs2 does not imply that pairs1=pairs2.