Changed layout, fixed bugs and added hover message

bugs:

* new edgestores where created without ids.
* rebuild view did not work as changedTiddlers is not an array but a hashmap
* when config component of view changes, all other components have to be recalculated.
* neighbours were not correctly selected
* existenceTables were wrongly used. replaced with lookuptables instead.

layout:

* hover message when mous is over a graph.

organization:

* many files were renamed