add docstring to Probe.get_actual_cache(), clean up
add docstring to Probe.get_actual_cache(), clean up

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