Add missing non-retina icon

Existed in directory, but not in project
Remove old NUX classes
Remove unused account/blog creation classes
Remove MP6sidebarvc… again

It keeps coming back!
Remove unused NUX file
#886 - fixed layout of NUX controls
Updated launch images for new design
#891 - fix position of no results view in Reader
#893 - added back to animated box in Reader
Removed motion effects from animated box
#895 - Fixed Jetpack information view not appearing in notifications tab
Merge pull request #884 from wordpress-mobile/issue/883-remove-orphaned-files

#883 Remove orphaned files
Tweaked visuals of WPNoResultsView
Merge pull request #887 from wordpress-mobile/issues/886-nux-layout

#886 - fixed layout of NUX controls
Merge pull request #889 from wordpress-mobile/issues/888-launch-images

#888 - Updated launch images for new design
Merge pull request #892 from wordpress-mobile/issues/891-no-results-view-position

#891 - fix position of no results view in Reader
Merge pull request #894 from wordpress-mobile/issues/893-animated-box-back

#893 - Add back to Reader animated box
Merge pull request #897 from wordpress-mobile/issues/895-notifications-jetpack-view

#895 - Fix Jetpack information view in Notifications tab
Fixed a bug where account creation would do nothing.
#878 - added show/hide toggle on NUX password fields