- Upgraded to Intel MKL 10.1 Update 1.
- Added class DoubleCOWeightedLeastSq for solving weighted least squares (WLS)
  problems
  using a complete orthogonal (CO) decomposition technique.
- Added class DoubleIterativelyReweightedLeastSq for solving iteratively
  reweighted least squares (IRLS) problems.
- Added classes DoubleLeastSqWeightingFunction, DoubleBisquareWeightingFunction,
  and DoubleFairWeightingFunction for least squares weighting functions.
- Added classes DoubleSparseVector, DoubleComplexSparseVector, and
  SparseVectorData for storing sparse vectors.
- Added classes DoubleCsrSparseMatrix, DoubleSymCsrSparseMatrix,
  DoubleComplexCsrSparseMatrix, DoubleHermCsrSparseMatrix, SparseMatrixData,
  ISparseMatrixStorage, and CompressedSparseRow for storing general sparse
  matrices in compressed sparse row (CSR) format.
- Added classes SparseMatrixFact, DoubleSparseFact, DoubleSparseSymFact,
  DoubleSparseSymPDFact, DoubleComplexSparseFact, DoubleSparseHermFact, and
  DoubleSparseHermPDFact for factoring general sparse matrices.
- Added MatrixFunctions.Pseudoinverse() method using SVD.
- Organized classes into solution folders inside Visual Studio.
- Added VS 2008 solutions for all examples and source editions.
- Added Add(System.Object) method to all types which implement IEnumerable.