Parallel Colt version 0.7 released

- Added iterative solvers and preconditioners (adapted from Matrix Toolkits for Java).
- Added HyBR solver - a Hybrid Bidiagonalization Regularization.
- Added nonlinear optimization package.
- Added JCublas (currently used only for matrix-matrix multiplication).
- Added CCDoubleMatrix2D and CCFloatMatrix2D.
- Added CCMDoubleMatrix2D and CCMFloatMatrix2D.
- Added DenseColDoubleMatrix2D and DenseColFloatMatrix2D.
- Added OpenLongDoubleHashMap and OpenLongFloatHashMap.
- Added cern.colt.matrix.io (matrix reader/writer, adapted from Matrix Toolkits for Java).
- Added cern.colt.matrix.tint (matrices holding int elements).
- Added conversion methods in SparseDoubleMatrix2D and SparseFloatMatrix2D.
- Added unit tests for iterative solvers.
- Rewritten unit tests for matrices.
- JLAPACK replaced by netlib-java.
- Internal storage changed in SparseDoubleMatrix1D, SparseDoubleMatrix2D, SparseDoubleMatrix3D, RCMDoubleMatrix2D and their single precision equivalents.
- From now on, the trigonometric transforms are only supported by DenseDoubleMatrix1D, DenseDoubleMatri2D, DenseDoubleMatrix3D, DenseColDoubleMatrix1D, DenseColDoubleMatri2D, DenseColDoubleMatrix3D and their single precision equivalents.
- JTransforms updated to version 2.2.
- Some refactoring and many cosmetic changes.