fix nexus save

Make save function use same function as edit to check what nexus to
save.
Fix properly since the issue is topics not nexus

changed var that needed to be looked at when checking
story_nerver_topic.

Make it so all nexuses can be disabled (main page will be shown by
default)
Fix templates

dispStory need the title on nexus stories to be a link in both regular
and brief stories.

Add new sections template that loads sections (nexuses) below main nav.
fixes for brief article styling
Fixes for broken messages
wrong rootdir