Updated sbt to 0.13.5
Merge remote-tracking branch 'origin/devel' into develop

* origin/devel:
  Added minIterations to FirstOrderMinimizer and SGD
Add Long specialization to Storage (it is used in classes with Long specialization downstream)
Organize unneeded imports
Reading through code to understand data structures (edit documentation, variable naming consistency)
some more consistency
Storage.scala specialization?
minor diff Storage.scala
Should norm be deprecated from NumericOps.scala?
more refactoring and documentation
deprecated NumericOps.norm() in favor of UFunc
Use a case class for SVD instead of a tuple
case classification of QR/eig/etc
Specialize breeze.linalg to Long as well
activeSize/iterableSize doc comments from David
generification of several FeatureVector ops
transpose multiplicaiton for feature vectors
remove scalalogging
Merge pull request #288 from mengxr/remove-scalalogging

remove scalalogging from dependencies
minor import streamline