Changed parameters to match convenctions with the other functions. Added check of the extension used in fileout

Completed the command to remove the png files and changed from 'rm -f' to SO independent with file.remove

Conflicts:
	deleted  inst/config/IC3.conf
	modified inst/doc/plot_timeseries.R

Develop plot box

This feature is ready to be tested. @lpcaron is in charge of that. Deadline to be decided today. Thanks!!

See merge request !97