Patch from Michael <virtual_worlds@gmx.de>
Full text: As usual I have modified only minor things to remove warnigs when compiled as C++ code, have added some const-specifiers where possible to help the compiler create more efficient code and added some static-specifiers to make functions invisible to other modules.
- add define "DM_DMRE 101" to zint.h as option_3 value
- add option "-dmre" to command line
- add ckeckbutton "Activate DMRE in automatic mode" to qzint
- make dmatrix.c/dmatrix.h aware of option_3 value DM_DMRE and include DMRE in automatic mode
- Use version 2.5 everywere (as already started by Robin)
- common test case for DMRE in automatic mode is numeric input data with 48 digits, which should lead to a symbol of size 8x64
Removed Data Matrix ECC 000 to 140 because (a) they don't work properly and (b) nobody uses them anyway!
Also removed some ghosts of Codablock-F - there are some more to find.
