Linear regression
make it easier to specify presense of, or make use of specified work array
oops
added explicit type annotation
rename file
lasso regression. Computes sparsified least squares solutions.
oops - forgot to compute rSquared
idiomatic style
Merge pull request #301 from stucchio/lasso

Lasso regression
Add distance functions:

- Euclidean distance
- Squared Euclidean distance
- Chebyshev distance
- Manhattan distance
- Minkowski distance
- Cosine distance
- Tanimoto distance
Convert == into === in tests and Remove assert messages
Merge pull request #306 from yu-iskw/distance-squashed

[#305] Add distance functions:
Fix test for cosineDistance
Merge pull request #308 from yu-iskw/fix-test

Fix test for cosineDistance
Merge branch 'master' of https://github.com/scalanlp/breeze into FilterRefactor