update printing SVN content with GitHub release

[andybeet]

In atlantismain.c the following lines

AtlantisTrunk/atlantis/atlantismain/atlantismain.c

Line 2546 in ff16d3c

printf("\nAtlantis SVN Updated to Version %s\n", ATLANTIS_REVISION);

should be updated to display like this:

AtlantisTrunk/atlantis/atlantismain/atlantismain.c

Line 2108 in ff16d3c

fprintf(fp,"Git release version: %s\n", RELEASE_VERSION);

To enable printing in the log file, we also need git installed in the container