Improve memory management and subscript interface.
Improve memory management and subscript interface.

memory management is now done through boost::pool.

serge-sans-paille/pythran,pombredanne/pythran,artas360/pythran,pbrunet/pythran,artas360/pythran,hainm/pythran,artas360/pythran,hainm/pythran,pbrunet/pythran,pombredanne/pythran,hainm/pythran,serge-sans-paille/pythran,pombredanne/pythran,pbrunet/pythran