New parameter REPIN-RAYT distance

[CFGrote]

@fredeBio added a new parameter to the java backengine to control the association distance between REPINs and RAYTs. This must now be exposed to the submitting user in the web interface.

TODOs

• [x] Merge branch frederic into develop
• [x] Branch out to this issue's branch
• [x] Test java CLI (maybe adjust default handling)
• [x] Add new parameter to python CLI
• [x] Test python CLI
• [x] Add parameter to model and database
• [x] Legacy support
• [x] Adjust submit html template
• [x] Adjust submit route
• [x] Test various cases

[CFGrote]

hard coded value was 200, see https://github.com/mpievolbio-scicomp/rarefan/commit/d7fbbf75f161e764e7b2832e72c9dc9f4b0de631#commitcomment-89124536