timeline: add week19.txt

timeline/week19.txt

+Week 19 (04.05.-10.05.)
+=======================
+
+[~] familiarize yourself w/ some tooling
+
+	[ ] run all quries from ulo paper in graphdb
+
+	[ ] run queries from code
+
+[ ] familiarize w/ MathHub infastructure
+
+	[ ] look at tooling; user interface &c
+
+	[ ] look at programming interfaces
+
+	[ ] evaluate databases for integration w/ MathHub
+
+[ ] exploration
+
+	[ ]  look at other graph databases; we need to at
+	     least look at alternatives, right?
+
+References
+==========