[cleanup] removing unused method
adding Javadoc and doing some small refactoring
Merge branch 'addingJavadoc' of github.com:davidmoebius/scim-schema into HEAD

Conflicts:
	src/main/java/org/osiam/resources/scim/CoreResource.java
	src/main/java/org/osiam/resources/scim/Group.java
	src/main/java/org/osiam/resources/scim/Meta.java
	src/main/java/org/osiam/resources/scim/Resource.java
	src/main/java/org/osiam/resources/scim/User.java
	src/test/groovy/org/osiam/resources/scim/UserSpec.groovy
[cleanup] improved and corrected java doc
[enhancement] added equals and hashcode
[cleanup] formatting