Utilize Github's (pull requests)[https://github.com/KvasirSecurity/Kvasir/pulls] to develop and commit code. Github promotes easily collaboration so you don't need to install a full development environment in order to contribute, you can do most tasks on-line.
For quick-and-easy bugs please submit a (pull request)[https://github.com/KvasirSecurity/Kvasir/pulls] through the Github interface with the fix. It will be reviewed and commented/accepted.