hvega: minor additions to README

Merge pull request DougBurke#92 from DougBurke/update-tutorial

Update tutorial to add another example

Merge pull request DougBurke#90 from DougBurke/ready-for-release

Fix up extra-source-files patterns in cabal file

Merge pull request DougBurke#25 from DougBurke/bump-ihaskell

Bump the upper bound of ihaskell to allow 0.10

Merge pull request DougBurke#25 from DougBurke/bump-ihaskell

Bump the upper bound of ihaskell to allow 0.10

Run notebooks with hvega-0.3.0.0

Run notebooks with hvega-0.3.0.0

Merge pull request DougBurke#21 from DougBurke/update-021-release-docs

Update documentation for PR DougBurke#15

Mention simplified requirements in Jupyter lab (over notebook)

Mention simplified requirements in Jupyter lab (over notebook)