com.megan.backingbean.socialauth.Authenticator ->
com.megan.backingbean.socialauth.MeganAuthenticator,

com.megan.shiro.SocialAuthRealm -> com.megan.shiro.MeganSocialAuthRealm
com.megan.backingbean.ThemeBean to definie used primefaces-theme in a
more flexible way.
Code-beauty.
Updating spring-configuration to modern style (less XML). Using
spring-repositories now.