reworked m.datum.shift for GRASS 5.0
If you need a 7-parameter-datum shift (bursa wolf transformation),
please uncomment the #define BURSAWOLF at the top of main.c.
The values for Rx, Ry, Rz and M must be given on the command
line, as the coordinate conversion library has no support for
this.

-- 
andreas.lange@rhein-main.de