Add a bit of basic documentation

[Anthchirp]

courtesy of @frol, provided in https://github.com/conda-forge/staged-recipes/pull/2479/files

Fixes #13.

[codecov]

Codecov Report

Merging #36 (590524d) into master (84f2587) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #36   +/-   ##
=======================================
  Coverage   92.85%   92.85%           
=======================================
  Files           6        6           
  Lines         280      280           
  Branches       47       47           
=======================================
  Hits          260      260           
  Misses         16       16           
  Partials        4        4           

Impacted Files	Coverage Δ
vine/__init__.py	100.00% <100.00%> (ø)

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