Ignore venv and README when building docs (#843)

* Ignore venv and README when building docs

This suppresses warnings during the docs build if the venv directory
exists.

* Remove html static path from Sphinx config

Fixes another Sphinx warning

Author: srittau

docs/conf.py

@@ -36,7 +36,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', 'venv', 'README.rst']
 
 
 # -- Options for HTML output -------------------------------------------------
@@ -49,4 +49,4 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = []