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

* origin/devel:
  Added minIterations to FirstOrderMinimizer and SGD
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
Merge branch 'master' of https://github.com/scalanlp/breeze into understandDataStructures
improved the interface for checking convergence in the optimizers.

You can now ask for min.minimizeAndReturnState instead, and that
will give you a state object with a .convergenceReason

fixes #250