script/plot_logs.py: update --rc option, update ParseRc to use eval()
script/plot_logs.py: update --rc option, update ParseRc to use eval()

- values with commas work
- update for current plot_log()

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