added printing of Green's function poles and weights.
a possible bug in ED_GREENS_FUNCTION related to ed_verbose has been fixed.

some updates to drivers/ed_bhz.f90 related to our work.
update of driver/ed_hm_bethe.f90 to test FFT against W2Dynamics.
update version following SciFor2.0 version.
- simplification in the Makefile with explicit linking libraries.
- small bug fixed in PLAIN_LANCZOS, including variables in a wrong way
from ED_VARS_GLOBAL and ED_INPUT_VARS.