Customized JsonMapper
Merge branch 'master' of github.com:kesapojat/codebrowser-backend

Conflicts:
	src/main/java/fi/helsinki/cs/codebrowser/service/DefaultSnapshotService.java
Merge branch 'master' of github.com:kesapojat/codebrowser-backend
Merge branch 'master' of github.com:kesapojat/codebrowser-backend
Merge branch 'master' of github.com:kesapojat/codebrowser-backend

Conflicts:
	src/main/java/fi/helsinki/cs/codebrowser/service/DefaultSnapshotService.java
Improved JsonMapper