FRQ: Generic text particle trajectory reader

[kai-luca]

Proposed new feature or change:

Many people save their simulation data as a collection of csv-, tsv-, txt- or whatever files. For these people to use AMEP we either need possibility to write AMEP files directly as output of their simulations or make as simple to use reader for these generic file formats.
In order to make more people in our group use AMEP I'm gonna implement this.
I dislike it a little bit but it's the quickest and easiest way to get them up to using amep without them totatlly reworking their framework.