AGPUSH-108 Updated groupId to org.jboss.aerogear
AGPUSH-103 Update java package names to org.jboss.aerogear*
AGPUSH-103 Updated test packages to org.jboss.aerogear*
add preemptive basic auth
add challenge
Merge branch 'security' of https://github.com/aerogear/aerogear-unified-push-java-client into security

Conflicts:
	src/main/java/org/jboss/aerogear/unifiedpush/async/AsyncClient.java
	src/main/java/org/jboss/aerogear/unifiedpush/resteasy/RestEasyClient.java
	src/test/java/org/jboss/aerogear/unifiedpush/DefaultJavaSenderTest.java