Updated pom to 2.2.2-SNAPSHOT
Fix NPE that can occur with null user

GitHub Issue #49
Merge pull request #50 from Nerdwin15/2.2

2.2 - Resolves Issue #49
Updated pom to version 2.2.2
Updated README with release notes
Merge pull request #52 from Nerdwin15/develop

Develop
Bumped pom to version 2.2.3 (already had 2.2.2)
Decided to make this a v 2.3 release
Bumped pom to 2.4.0-SNAPSHOT