Commented a concatenation of the old file with the new file while they had the same name; only if they span different forecast times the files should be concatenated

Bug-fix: the variable leadtime is already in the file, the dimension leadtime is not hence -v should be -d

Bug mix members

Merge branch 'bug-mix-members' of https://gitlab.cfu.local/cfu/atmosphere_diagnostics into bug-mix-members

Add automatic selection of members if list is left empty + check if prescribed members are not present (+ fixes with trap function)

Add a 'trap' command to automatically clean up the workdir (after a week) if the post-processing fails

Adding Chloé's new scripts designed to calculate monthly statistical values (10th and 90th percentile and number of days over the climatological 10th and 90th percentile) from daily or 6 hourly data to the git project