Document history summarizer as being non-null (#363)
(cherry picked from commit dafe3c0)
Document user and item DAOs as returning null (#363)
(cherry picked from commit d47e339)
Properly handle null profiles in item scorers (#363)
(cherry picked from commit bc0d846)
Go ahead and CI the stable branch (#362)
exclude LensKit artifacts from Travis pre-download (#362)
(cherry picked from commit 594e8d8)
Only pre-install Maven plugins (#362)
(cherry picked from commit d5fbfb2)
improve usage when eval script is not found (#352)

(cherry picked from commit b4c01a6)
Update release notes to point to GitHub
Add release notes for 2.0.1
(cherry picked from commit 2046987)
Clean up bad 1.4 release notes
(cherry picked from commit 422a012)
Fix 2.0.1 release note link
Add release notes for 2.0.2
Document History changes

- Add forUser to release notes
- Add @Nonnull annotations

[skip ci]