add a column for the experiment name to differentiate tool and experiment name (2 columns: tool name and paper name)

Problem: in https://github.com/kth-tcs/defects4-repair-reloaded/blob/master/tables/patches_info.csv
the tool name mixes the tool name and the experiment name.

For instance in Nopol2017, the tool name is "Nopol" and the "experiment name" is "Githubt2017".

For ACS, the tool name is "ACS" and the experiment name is "ICSE16".

I propose to add a column for the experiment name in all tables starting with patches_info.csv

Start with tables/patches_info.csv and inspect the Nopol2017 and ACS rows to determine how tool and experiment names are currently combined. Identify the other tables covered by the issue, then separate these values consistently; done means each affected table has distinct tool-name and experiment-name columns.

Written by the indexing model from the issue text.