added some training options
added a nice loop to loop over days
use non-negative feature hasher so that Naive Bayes would work
added some stuff
merge collocation branch
use custom extensions for other experiments
make eugene's stuff work again
add back k-neighbors classifier
Fix chi-square feature selection

Make chi-square feature selection work when using a hashing
vectorizer or another vectorizer that does not provide feature
names.
refactor JS charts
add .dominoignore
Merge branch 'm_timetest_collocation' of https://github.com/escherba/classifier_comparison into domino_parallel