switching to apache commons path where possible.
using the SimplexSolver for LP solving.
poly -> polyval to be more consistent with matlab.
faster constructors for DenseMatrix, DenseVector.
Merge branch 'apache-commons'
sped up DenseVector.zeros for the common case of primitive values.
Counter2 operations
Merge remote-tracking branch 'scalanlp/master'

Conflicts:
	project/Project.scala