Docs: several fixes
Fix editor failing with Python 3
open -> launch
Import tempfile late
Merge pull request #106 from enkore/fix-editor-py3

Fix editor failing with Python 3
Merge pull request #104 from julen/doc-fixes

Docs: several fixes
Fixed some 3.x problems.
Fixed a bug in tempfile pager.  This fixes #107
Do not show help or version if resilent parsing is enabled.
Fixed a bug with the version flag introduced last commit.
Added resilient parsing to the docs
progressbar: add automatic full-width mode
Fixed a bug with autowidth on progress bars.