Added --slide-level option to override default.

This allows users to select a slide level below the first
header level with content.

Note that content under sections above the slide level will not appear
in slides (either in beamer or in HTML slide shows).

This is primarily useful for creating documents that can be made
into both slides and handouts (which contain additional content
outside the slides).

1 files changed, 5 insertions, 7 deletions

diff --git a/templates b/templates
-Subproject dc936548c2b07617a799611b0968b503614be9f
+Subproject c6ffb2602f792309509ee72dc283e222e09c71f