Add the new easy template for org-beamer.
Add tnoda-beamer.sty.
Add the presentation and bigger option for Beamer expoert.
Revert "Add the presentation and bigger option for Beamer expoert."

This reverts commit 86e91d451161d5b465792604e297a0c6ab671209.
Merge branch 'master' into org-beamer
Clean up org-export-latex-classes.
Merge branch 'master' into org-beamer
Use graphviz-dot-mode when editing dot blocks.
Merge branch 'org-beamer'