Added rm -f CMakeCache.txt to cmake build tool section of dorsal.sh.
Use 'which' to get default python executable. Fixes problem when building Trilinos.
Bump CGAL version to 4.3.
Merged in poconbhui/dorsal/trilinos-cmake-reconfigure-fix (pull request #6)

Added rm -f CMakeCache.txt to cmake build tool section of dorsal.sh.