version 0.2.09

Changes:
- support multiple penalties in pics tool
- fix problems with odd matrix sizes
- fix performance regression (fftmod, gram_matrix)
- added tools: show, rmnse, sub, fakeksp, version
- example script for GRASP reconstruction
- experimental wave reconstruction
- toimg: write sequence of 2D images
- make cfl file format reader forwards compatible
- a sampling pattern can be specified with rsense
- autogenenerated .gitignore
- exuberant ctags script
- library: finite difference operator
- library: experimental simplex code
- library: generalized calibration matrix construction
- other minor bug fixes and enhancements