resolvePathsAndNames.py, etc : Add function to decode/encode generator
Hi, Andre,
This MR is to use stdhepsplit in ILDProductionChainOpt2017.py.
To this end, a generator file name convention is newly defined in Core/Utilities/FilenameEncoder.py.
Additionally, Core/Utilities/resolvePathsAndNames.py is now assumes input is a generator file, if the first character
of file name is "E". It returns the input file name, if the first character is neither "s", "r" nor "E". Previously,
it returned an empty string, if neither "r" nor "s".
regards Akiya