Updating docs#82

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lepmik wants to merge 4 commits intodevfrom

Commits on May 3, 2019

docstrings for group, dataset, raw, attributes and a getting started file with more elaborate tutorial, index is reduced to a bare example
lepmik
committed

Commits on May 7, 2019

Commits on Aug 15, 2019

Merge branch 'dev' into lepmik/docs
dragly
authored