Squashed 'subtree/bokehjs/' changes from e62ef24..e9cf3c4

e9cf3c4 all bokeh elements have a class of bokeh on them, bootstrap modified to have all rules prefixed by bokeh

git-subtree-dir: subtree/bokehjs
git-subtree-split: e9cf3c42e3e3d0e8cdc6f33a8fd0ab50bad6e225
bootstrap now longer conflicts with detail page styling for the gallery
 improved styling
 latest mods to build_gallery
 initial sphinx commit
 working on getting plots embedded into the sphinx doc
 initial sphinx inclusion
 build gallery now reflects partial s3 hosting
 better documentation
 better styling
 now writing out the gallery as gallery.html
 removed embed tool
Updating author info in conf.py
Big documentation update
Exposing capability in LinearAxis to be located in the middle of a plot
minor update to roadmap.md
 reflects most recent docs
 merged
 merged
merged in sphinx