try sphinx better theme

Found a new theme for sphinx.

Demo site looks nice & simple.

Let’s apply and see what kind of effect will have on my documentation.

Application procedure is quite simple. Install sphinx-better-theme package.

$ sudo pip install sphinx-better-theme

Apply theme by modifying conf.py.

from better import better_theme_path
html_theme_path = [better_theme_path]
html_theme = 'better'

Ok, stay with this theme.