BART: version 0.4.02

The Berkeley Advanced Reconstruction Toolbox (BART) is a framework for image reconstruction in Magnet Resonance Imaging (MRI). It consists of a programming library and a toolbox of command-line programs. The library provides common operations on multi-dimensional arrays, Fourier and wavelet transforms, as well as generic implementations of iterative optimization algorithms. The command-line tools provide direct access to basic operations on multi-dimensional arrays as well as efficient implementations of many calibration and reconstruction algorithms for MRI. Changes: new tools: std var vec wavepsf whiten std: compute standard deviation (Jonathan Tamir) var: compute variance (Jonathan Tamir) vec: create vectors from the command line wavepsf: create PSF for wave acquisition (Siddharth Iyer) whiten: compute/apply whitening matrix (Jonathan Tamir) pics: basis pursuit formulation (Jonathan Tamir) nlinv: support for simultaneous multi-slice (Sebastian Rosenzweig) nlinv: various enhancements and fixes (Christian Holme) pics: support for simultaneous multi-slice (Sebastian Rosenzweig) traj: radial simultaneous multi-slice trajectories (Sebastian Rosenzweig) fft: uncentered option (Jonathan Tamir) nufft: use Toepliz-mode by default nufft: add GPU option python 3 version for bartview (Siddharth Iyer) fix compilation for Cygwin on Windows (Johannes Töger) include relevant parts of LAPACKE in BART library: add NIHT algorithm (Sofia Dimoudi) library: add Chambolle-Pock primal dual algorithm for F(Ax) + G(x) (Jonathan Tamir) library: add md_zss function for sum-of-squares (Jonathan Tamir) library: improved parallelization (Michael Anderson) library: joint l1-wavelet regularization library: rename wavelet3 to wavelet library: Hamming and Hann windows (Jonathan Tamir) library: png write functions (Christian Holme) library: initial interface for nonlinear operators many other bug fixes and improvement