EPP module, EPP script example and EPP script for attaching caliper images.

The attach_caliper_files.py script will solve the task of uploading caliper images to the server. The logging feature can be further polished. When it comes to the EPP module, The EPP:s in the LIMS are a lot easier to use than the REST API for several tasks, mostly due to missing functionality in the REST API. Since there will be tons of these scripts it might be useful to have a module for common tasks. I also added a example EPP script in the examples dir.