Add implementation of cdbmake.py.
Add implementation of cdbmake.py.

douglasbagnall/python-pure-cdb,douglasbagnall/python-pure-cdb,pombredanne/python-pure-cdb,douglasbagnall/python-pure-cdb,dw/python-pure-cdb,pombredanne/python-pure-cdb,dw/python-pure-cdb