CC @thunterdb @felixcheung Did I miss anything?

Tests ran locally for (spark 2.0, 2.1) x (scala 2.10, 2.11)
I'm also testing the locally published packages.

Codecov Report

Merging #179 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #179   +/-   ##
=======================================
  Coverage   88.14%   88.14%           
=======================================
  Files          17       17           
  Lines         717      717           
  Branches       56       56           
=======================================
  Hits          632      632           
  Misses         85       85

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Got a LGTM from @thunterdb offline. Merging now.

LGTM

hooray for rolling 0.4.

comments:

• doesn't this https://github.com/jkbradley/graphframes/blob/749028eb1bdf7f3f491a12b369e4bb639c6ef477/build.sbt#L26 need to be updated?
• and https://github.com/graphframes/graphframes/blob/master/docs/_config.yml#L17

So I did update those when building the project, but I didn't want to make the master branch a non-snapshot. Really, we should start cutting actual release branches, rather than just using tags. Let's do that for the next release.