add Makefile with Latex generation

Makefile

+run:
+	jupyter notebook
+rebuild:
+	./gradlew shadowJar
+install:
+	./gradlew installKernelSpec
+
+NOTEBOOKS = notebooks/tutorials/prob_solver_intro.ipynb \
+               notebooks/manual/ExternalFunctions.ipynb
+latex:
+	for spec in $(NOTEBOOKS); do \
+		echo 'Generating Latex for: '; echo $$spec ; \
+		jupyter nbconvert $$spec --to latex ; \
+		done
+	echo "done"
\ No newline at end of file