Adding a coarse-grained force field MARTINI

**Is your feature request related to a problem? Please describe.**
There is no problem related to it but it would help to simulate larger system avoiding using too large systems which would be good for memory usage as well.

**Describe the solution you'd like**
Add the force field

**Describe alternatives you've considered**
Other coarse-grained force fields

**Additional context**
Nothing to add