new absolute threshold algorithm and added unit tests
unit test for new algo
remove unused import
remove unused file
Adding diff percent algo as well
update comment
remove prints
fix doc
update doc string in time series
change score/diff percent to float
fix doc string again
adding upper and lower thresholds for absolute algo
Merge pull request #288 from RiteshMaheshwari/master

[Luminol] New "absolute threshold" and "diff percent" algorithms for anomaly detection