+466 Powerdot updates:
+ \pause[] layout Pause
+ \onslide{}{} InsetFlex, InsetArgument
+ \onslide*{}{} InsetFlex, InsetArgument
+ \onslide+{}{} InsetFlex, InsetArgument
+ \twocolumn[]{}{} Layout Twocolumn, InsetArgument
+ \item[]<> InsetArgument
+ \begin{enumerate|itemize|...}[] InsetArgument
+467 support for iwona math font (the other iwona fonts are already supported); done in master