initial version

cleaned-up the sources of the ITP course
- remove internal notes
- remove exercise solutions
- remove KTH logo
- add Creative Commons license

exercises/Makefile

@@ -0,0 +1,5 @@
+all:
+
+clean:
+	rm -f *Theory.sig *Theory.sml *.ui *.uo \#* *.toc *.aux *.ps *.log *.lof *.bbl *.blg *.hix *.tid *.tde *.out *~
+