timeline: add week24.txt

doc/timeline/week24.txt

+Week 24 (08.06. - 14.06.)
+=========================
+
+[ ] mmt: upstream changes to importers s.t. we don't get faulty data
+    in the future
+
+[ ] supervision directory: clean up, find reasonable nomenclature
+
+[ ] meta: set up time tracking?
+
+[ ] meta: set up work items, probabl use Gitlab issues for that
+
+[ ] endpoint: read up on ULO/RDF features
+
+[ ] endpoint: set up basic SPARQL endpoint, documentation is probably
+    the most important here
+
+[ ] endpoint: set up sample application w/ SPARQL endpoint
+
+[ ] endpoint: set up basic RDF4J endpoint, again documentation will be
+    important
+
+[ ] endpoint: set up sample application w/ RDF4J endpoint
+
+[ ] report: compare SPARQL and RDF4J endpoints
+
+[ ] report: write report so far, collect citations