- moved from pdflatex to xelatex
- changed all the .sty files to those build from th latest version of
mtheme
- reworked the default template in a series of ways
- removed a bunch of cruft
- changed the logo to the new centered logo
- moved over to the new notes format (requires the new version of pdfpc)
- pre-process the logo.pdf instead of doing it in the makefile
- addes new support for putting the slide revision (from git) on the
first slide
