add ToDo file.
new file:   _ToDo.txt: things to do in future (i.e. next work tasks or ideas).
change image type to image sequence type.
modified:   CImg.warping.cpp: change img type from CImg to CImgList.
modified:   Makefile: upgrade version to development version.
modified:   VERSION_WARPING: v0.0.3.dev .
modified:   _ToDo.txt: add todo for 3D warping.
plane loop (Work in Progress)
modified:   CImg.warping.cpp: add block for plane loop.
add z loop and reshape (WiP 3D need test on reshape, but still works well in 2D warping/mapping i.e. -nz 1).
modified:   CImg.warping.cpp: setup same image for all planes using -nz option; add plane loop; add reshape of map.
small changes.
modified:   _ToDo.txt: add an option and reorder todos.
add load from stdin.
modified:   CImg.warping.cpp: add image loading form stdin; add color image output (i.e. selection for each planes; -oc option).
modified:   _ToDo.txt: set -oc done.
add color selection images.
modified:   CImg.warping.cpp: setup color images during hand selection (same output for nz=1).
modified:   _ToDo.txt: set -i done.
mapping: add 3D warping input (i.e. -z option).
modified:   CImg.mapping.cpp: add -z command line option for mapping at z position in 3D warping; change map size check; add 2D mapping at 3D z position in 3D warped volume.
modified:   Makefile: setup developpement version for mapping and format (i.e. v0.0.2 that is fully compatible with v0.0.1 but add 3D warp feature).
modified:   VERSION_MAPPING: version v0.0.3.dev .
modified:   VERSION_WARPING_FORMAT: version v0.0.1.dev .
modified:   _ToDo.txt: small changes.
modified:   _info.txt: add 3D warping example.
mapping: add 3D mapping in warped volume.
modified:   CImg.mapping.cpp: add z mapping in map container; add -zs for this purpose.
mapping: remove 3D mapping of 3D warping volume as it could be very large, using "on the fly interpolation" instead.
modified:   CImg.mapping.cpp: remove zscale option that corresponds to; remove 3D mapping of 3D warping volume; replaced by "on the fly interpolation" using map.linear_atXYZ(x,y,z0,?) (checked: not differences at z=0.0 and z=1.0, tiny ones at z0=0.2 ).
warp/mapping: setup 3D warping and 2D mapping in any parallel plane to calibration planes (v0.0.4)
modified:   CImg.mapping.cpp: clean code and todos.
modified:   CImg.warping.cpp: setup (X,Y,Z) calibration steps and save X,Y and Z grids; clean code and todos.
modified:   Makefile: upgrade versions to v0.0.4 for both warping and mapping, and for format that is still compatible with the previous one.
modified:   VERSION_MAPPING: v0.0.4 .
modified:   VERSION_WARPING: v0.0.4 .
modified:   VERSION_WARPING_FORMAT: v0.0.2 .
modified:   _ToDo.txt: update and add todos.
mapping: small changes.
modified:   CImg.mapping.cpp: clean todos.
warping: detect cross number (WiP)
modified:   CImg.warping.cpp: draw top line on display.
warping: draw graph for extracted line.
modified:   CImg.warping.cpp: draw graph for extracted line.
warping: get top cross number.
modified:   CImg.warping.cpp: get top cross number (i.e. x cross number).
modified:   Makefile: setup developpement version.
modified:   VERSION_WARPING: v0.0.4.dev .
warping: draw top cross positions on color image after number detection.
modified:   CImg.warping.cpp: draw top cross positions on color image after number detection.
warping: move cross number detection to function.
modified:   CImg.warping.cpp: move cross number detection code from main to cross_number_detection function.
warping: add left cross number detection.
modified:   CImg.warping.cpp: add left cross number detection.
warping: setup cross number detection on first plane (and check same number of crosses between left/right and also top/bottom).
modified:   CImg.warping.cpp: setup detection of cross number on 4 borders: top, left, bottom, right; check corresponding numbers and print warning if differ.
modified:   _ToDo.txt: update things that are done.
modified:   _info.txt: change exemple for automatic detection of cross number along both X and Y axes.
warping: cross number dectection and check (on first plane in 3D warping).
modified:   CImg.warping.cpp: clean code.
modified:   Makefile: upgrade warping version to v0.0.5 .
modified:   VERSION_WARPING: version v0.0.5 .