Added course seeds#1

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JeremyCrowley wants to merge 9 commits intomasterfrom

Commits on Sep 2, 2016

added tree (decision tree) to timeline
mmwebster
committed

Commits on Sep 3, 2016

fixed course<->student relationship mapping
mmwebster
committed

Commits on Oct 1, 2016

completed seed file for bsoe courses
JeremyCrowley
committed