Software needed for installation

• scons 0.96.91 or newer, see http://www.scons.org/
• python 2.3.4 or higher, see http://www.python.org/
• numarray 0.9 or higher, see http://www.stsci.edu/resources/software_hardware/numarray
• python boost boost 1.31.0 or higher (build system defaults to boost 1.33.0), see http://www.boost.org/
• g++, see http://gcc.gnu.org/, or intel c++ compiler, see
  http://www.intel.com/cd/software/products/asmo-na/eng/compilers/.