Update README.md with contribution information

Julien LepillerThu Apr 18 14:25:39+0200 2019

54b501d

nani/app/gradle/wrapper
namelast commitdate
gradle-wrapper.jarInitial commitSat Apr 06 13:19:46+0200 2019
gradle-wrapper.propertiesInitial commitSat Apr 06 13:19:46+0200 2019