Initial commit
renjie initial code
Merge pull request #1 from wstefan/master

added LBFGS solver for L2
Merge pull request #2 from wstefan/master

version with group sparsity
ENH: @wstefan out of source nfft build
ENH: vtk reader
Merge pull request #3 from fuentesdt/master

out of source build
ENH: complex data
WIP: vis trajectory
Merge pull request #4 from fuentesdt/master

vis
STYLE: merging
Merge branch 'primaldualbranch'
Merge pull request #1 from ImageGuidedTherapyLab/master

updates