stop omitting time_poisson_explicit.py in script/gen_gallery.py
stop omitting time_poisson_explicit.py in script/gen_gallery.py

BubuLK/sfepy,rc/sfepy,vlukes/sfepy,lokik/sfepy,rc/sfepy,lokik/sfepy,sfepy/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,BubuLK/sfepy,BubuLK/sfepy,lokik/sfepy,sfepy/sfepy,vlukes/sfepy,lokik/sfepy