Add CONTRIBUTING.md (#1201)
Add CONTRIBUTING.md (#1201)

Added a CONTRIBUTION.md page for the project.

Contains a link to the wiki with more detailed description of the contribution workflow.
halfflat/arbor,halfflat/arbor,halfflat/arbor,halfflat/nestmc-proto,halfflat/arbor,eth-cscs/nestmc-proto,eth-cscs/nestmc-proto,eth-cscs/nestmc-proto,halfflat/arbor,halfflat/nestmc-proto,halfflat/nestmc-proto