Factored out apache commons 3
Made all spring dependencies provided
Removed guava dependency
Removed unused argument, simplified method
Removed persistence .xml
Moved logic from utils to constraints
Updated version to 2.0.4
Bumped to 2.0.5-SNAPSHOT
More javadoc changes and renamed annotation property
Reverted to java 1.6
Merge commit 'cb953762728cac86d5feb07f22ea18fd70a5a33d' into feature/upgrade_dependencies

Conflicts:
	jarb-constraints/pom.xml
	jarb-constraints/src/test/java/org/jarbframework/constraint/TestConstraintsConfig.java
	jarb-sample/src/main/java/org/jarbframework/sample/config/ApplicationConfig.java