Redo of fixing templates structure.
Some more fixes.
Redo after corrupted codebase.
Added serve option as a post processor.
Deleted writer version of --serve.
Capturing Keyboard interrupt.
Adding --to slides --post serve example in help.
add unformal Name for 1.0
unformal name -> codename
Deleted empty spaces.
add output flag to nbconvert

fixes 3799
Added webbroser to auto open the slideshow.
Made open_in_browser configurable.
signature_scheme lives in Session

not ConnectionFileMixin
remove UsageError
mention metadata / display_data similarity in pyout spec
remove pylab from notebook doc
update nbconvert doc

update to new CLI

remove documentation of ill-advised `--script` option.
new util that also passes back the returncode
test for get_output_error_code