libcloud fix data manager, l1agen_hawkeye keep scan_time to get time_coverage_start even if delta time in first line is 0, grid_utils fix for gebco, add CGAL lib, new coefficents for AVW
libcloud fix data manager, l1agen_hawkeye keep scan_time to get time_coverage_start even if delta time in first line is 0, grid_utils fix for gebco, add CGAL lib, new coefficents for AVW