DOC: Just use github for roadmap
DOC: Rename file
DOC: Make more pythonic
DOC: Use get_rdataset.
DOC: Use formula namespace
DOC: Cleanup docstrings.
DOC: Fix directive.
DOC: Fix bullet list.
DOC: Add release notes to index
DOC: Fix docstrings.
Merge pull request #2047 from jseabold/docs-cleanup

DOC: Documentation cleanup