the demo site does not use psycopg2
settings_dev is unused
remove redundant requirements from demo
Merge remote-tracking branch 'origin/mezzanine-django-1.4'
Remove Mezzanine's set_dynamic_settings from tests

In Mezzanine 3.1.10, set_dynamic_settings is removing South from the
INSTALLED_APPS which was causing all of our tests to fail.  We already
removed our reliance on set_dynamic_settings in the demo site, we don't
need it for the tests either.
install the compressor finder in tests
Put the WidgyPage preview button in object-tools
Contextual save/commit buttons
Warning messages when a page has unpublished commits

'Unpublished' being not-yet-live commits, for whatever reason.
Added copy to Unpublish page
Added tests for WidgyPage admin page buttons.
Removed unused clean_status.
Added commit_is_ready method to VersionTracker.
widgypage_change_form.html belongs in widgy_mezzanine, not page_builder
Test WidgyPage save actions
Remove django.fusionbox.scss

It had more than one purpose. Moved the history page styles into their
own file, and moved widgy-tools into widgy_theme_default.
Rearranged WidgyPage buttons
history.html belongs in widgy, not widgy_mezzanine