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
 working on getting plots embedded into the sphinx doc
 initial sphinx inclusion