Add contributing information#368

Merged

mfeurer merged 6 commits intodevelopfrom

contributing_info

Apr 4, 2018

Commits on Oct 16, 2017

ADD contributing guidelines and github templates
mfeurer
committed

Commits on Nov 29, 2017

Merge branch 'develop' into contributing_info
janvanrijn
authored

Commits on Mar 29, 2018

Commits on Apr 3, 2018

Added clarification for unit test on Windows.
PGijsbers
authored