move examples from lecture 4 and generate html files from them
diffM --git a/04_practice/Makefile b/04_practice/Makefile
index 0d1d1ed..a02a76c 100644
--- a/04_practice/Makefile
+++ b/04_practice/Makefile
@@ -1,8 +1,10 @@
 all:
 	rst2html.py practice03.rst > practice03.html
 	rst2xetex.py practice03.rst | xelatex -jobname=practice03
+	for f in *.py; do pygmentize -l py3 -f html -O full,style=pastie,encoding=utf-8 -o $${f%.*}.html $$f; done

 clean:
 	rm -f practice03.html
 	rm -f practice03.pdf
 	rm -f *.aux *.log *.out
+	for f in *.py; do rm -f $${f%.*}.html; done
Fix links on examples from lecture 4