Initial layout redesign.
Collapsible navigation bar.
Options panel
toc
General cleanup
More stuff
Reinclude header navigation items, footer, and the new admonition styles
Misc fixes
docs styling
resolved conflict
added iamges
Disable collapse in h1 headers.
Move social icons to the right column
more css tweaks
more css adjustments
Style fixes
resolve conflicts.
Merge pull request #28 from rawfalafel/master

Docs redesign [XGENTOOLS-929]