Move selection/plotting into own function

Plotting is thus much easier and also potentially nicer.
Hardcode path for getting git hash

If any of the analysis scripts weren't called from inside their
directory, we couldn't detect the git hash.
With hardcoding the path we should be able to always get it...
Adapted for longer experiment IDs and new paths

The experiment IDs are now 8 digits long, so we need to also get those
Ignore geany run script and test file
Outsource folder list getting to function

Changing it in all files is very annoying.
Since the date (20140920) is also 8 digits long, we were not able to get
the correct experiment IDs.
Correcting this into the folder getting routine and putting that routine
into functions.py, since we use it in all the analyis scripts.