DOCS: clean up conf, use numpydoc and trim down included modules for now
DOCS: fix docstring in Tree
DOCS: restructure
DOCS: restructure
DOCS: rm sphinx-bootstrap submodule
DOCS: add readthedocs theme
DOCS: readthedocs colours
DOCS: mv _themes to themes and add missing root_numpy reference
restructure logger docs and add stubs for files, trees, and plotting
start on histogram docs
use cursive font for main header
add logo
plotting style docs