Update calc_td.tex
Update 4wins_td.tex

Hinweis von Tic Tac Toe ergänzt.
Merge pull request #1 from oerpli/patch-1

Update calc_td.tex
Merge pull request #2 from oerpli/patch-2

Update 4wins_td.tex
Merge pull request #15 from oerpli/master

minor fixes
postfixcalc: added hint concerning stack implementation
SS14 improvements