Merge pull request Sage-Bionetworks#712 from Sage-Bionetworks/v1.9.4-rc

V1.9.4 rc to master

Merge pull request Sage-Bionetworks#667 from kimyen/1.9.2-docs

update docs

Merge pull request Sage-Bionetworks#648 from kimyen/v1.9.1-rc-docs

update docs

Merge pull request Sage-Bionetworks#618 from kimyen/release1.9.0

update docs

Merge pull request Sage-Bionetworks#583 from kimyen/rn

release notes

Merge pull request Sage-Bionetworks#540 from Sage-Bionetworks/develop

release 1.8.1 develop to master

Merge pull request Sage-Bionetworks#534 from Sage-Bionetworks/develop

release 1.8.0 to master

Merge pull request Sage-Bionetworks#524 from zimingd/SYNPY-658-keyrin…

…g-review-fix

removed unused imports (SYNPY-658)

Merge pull request Sage-Bionetworks#509 from zimingd/release-175

rolled version to 1.7.5

Merge pull request Sage-Bionetworks#506 from Sage-Bionetworks/develop

1.7.4 Release to master