Minifix for the archiving function

Stripping the slash off the directory name using rstrip instead of [:-1]
which assumes that the slash is necessarily there.
Added another function for the plotting script

Added a function that allows the plotting script to get the simulation
folder and the value that is expected as the real one
Removed LogReader from the script

Removed LogReader and done some minor refactoring
Fixed parameters and data file lookup

Fixed the parameters that need to be provided to the script (earlier it
needed a data file name and the directory path together). Now only the
directory path is required and the json file is looked up using glob.