implemented scurity context for access control on resource level

	modified:   src/main/java/org/komorebi/core/resources/user/Location.java
	new file:   src/main/java/org/komorebi/core/security/KomorebiSecurityContext.java
	modified:   src/main/java/org/komorebi/core/security/ResourceAuthFilter.java
	modified:   src/main/java/org/komorebi/core/security/User.java
        modified:   src/main/java/org/komorebi/core/security/UserStore.java
preparation for PUT to resource /user/location
first steps of privileges system

	modified:   src/main/java/org/komorebi/core/resources/user/Location.java
	modified:   src/main/java/org/komorebi/core/security/KomorebiSecurityContext.java
	new file:   src/main/java/org/komorebi/core/security/Privilege.java
	modified:   src/main/java/org/komorebi/core/security/User.java