update plot_log() for plotting to given list of axes
update plot_log() for plotting to given list of axes

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