Stats spec.
More stats spec.
Implement
Add test, implement Slope.
Run the test and fix the ensuing bugs.
lint, egg, sausage and lint.
egg, bacon and lint
Merge branch 'master' into stats
after pleroy's review
Merge pull request #73 from eggrobin/stats

Stats
Log info to INFO, not to ERROR, harm on ice, yo dawg, I heard you liked errors, so I put errors in your errors so you can EXPECT_THAT while you EXPECT_THAT.
After pleroy's review.
Merge pull request #74 from eggrobin/log-to-INFO

Miscellaneous fixes to the SPRK and its test.