Initial crack at #518: story viewer should be navigable such that one section is shown at a time.
Story viewer: hide toc on click on story section. (#518)
Story viewer: substitute "Section x" when section titles are blank. (#518)
Story viewer: highlight current entry in toc. (#518)
Story viewer: refine open/close behavior. Click outside of toc closes toc. (#518)
Story viewer: tweak usability of TOC. Link target area takes up full width. Hover state indicates that. (#518)
Viewer: make prev/next buttons stay put and enable/disable rather than appear/disappear. Tweak styling. Add a (x/x) section counter below prev/next buttons. Note: in this commit the title attribute on the prev/next buttons is not present because handlebars is totally kicking my butt with some behavior that seems really strange to me but is probably down to a misunderstanding of either how it works or the structure of context data being passed in. (#518)
viewer: fix for missing title attributes on previous/next buttons. Unclear on reasons why this is necessary. (#518)
Viewer: tweak hover styling on previous/next buttons. (#518)
Viewer: tweak for prev/next button visual state on disabled and hover. (#518)
Merge branch 'develop' of https://github.com/PitonFoundation/atlas into 518-story-viewer-nav
Update readme for issue #518.
Merge branch '518-story-viewer-nav' of https://github.com/patternleaf/atlas into 518-story-viewer-nav
Merge pull request #617 from patternleaf/518-story-viewer-nav

518 story viewer nav