Run MPTRAC within the MESSy environment

[janhclem]

Use the MPTRAC library to run trajectories as a replacement for the CLaMS trajectory module.

• [x] Install MESSy/CLaMS and set up a test case with a climatological run.
• [x] Identify potential "access points" to load functions of the MPTRAC library and to replace code from CLaMS
• [ ] Understand how to compile and use libraries in MESSy
• [ ] Implement converter functions from CLaMS to MPTRAC and vice versa.
• [ ] Implement functions to read the config for MPTRAC, either as name lists or by giving the pathway to the config.ctl file to the name list of CLaMS.
• [ ] Test using the library in MESSy/CLaMS by using read_ctl
• [ ] ... then by using get_met
• [ ] ... and so on ...
• [ ] When all components can be used run the entire script and intercompare results with the default run.