OSNG-9 created hypermedia stuff
Merge remote-tracking branch 'origin/master'

Conflicts:
	oauth2-client/src/main/java/org/osiam/oauth2/client/AccessTokenServlet.java
	oauth2-client/src/main/java/org/osiam/oauth2/client/HTTPConnectionWraper.java
	oauth2-client/src/test/groovy/org/osiam/oauth2/client/AccessTokenServletSpec.groovy
	oauth2-client/src/test/groovy/org/osiam/oauth2/client/HTTPConnectionWraperTest.groovy
removed some not needed classes, wrote some tests, changed secured
resources