Update Jingo version to 0.6.1.

- Replace all jingo.render calls
- Convert all email templates to Jinja2
- Replace safe_django_forms with jingo.monkey.patch()
- Remove dead code from demos.urls
Fix bug 856121: Use Django's sensitive-data controls.

This basically only applies the 'sensitive_post_parameters' decorator
to a few views in the users app; we probably don't even need them
there, but since that app has some forms that can handle passwords,
better safe than sorry.
update vendor submodule with jingo upgrade
bug 866459: Tweak kumascript retries and max jobs per process
fix bug 859875 - email change notifications UI

page_watch waffle flag
Merge pull request #1051 from ubernostrum/sensitive-data-856121

Fix bug 856121: Use Django's sensitive-data controls.
Merge pull request #1053 from lmorchard/866459-tweak-retries-and-max-jobs

bug 866459: Tweak kumascript retries and max jobs per process
Merge pull request #1052 from groovecoder/jingo-upgrade-rebase

Jingo upgrade rebase
Merge pull request #1050 from groovecoder/page-watch-email-859875

fix bug 859875 - email change notifications UI
fix jingo bug in ckeditor_config view
Merge pull request #1055 from groovecoder/jingo-ckeditor-config-js

fix jingo bug in ckeditor_config view
Add May and July 2013 Derby copy.
Merge pull request #1056 from openjck/derby-copy-2013-05

Add May and July 2013 Derby copy.
fix bug 861996 - Adding YouTube plugin
Merge pull request #1023 from darkwing/youtube-861996

fix bug 861996 - Adding YouTube plugin
fix bug 868103 - Update main menu
Merge pull request #1057 from darkwing/menu-868103

fix bug 868103 - Update main menu
Put arrows in better spot on old menu
Merge pull request #1058 from darkwing/new-menu-update

Put arrows in better spot on old menu
Updates per Ali's request