ARQ-1546 Clean up POM files in preperation for release

* Rename top level parent to arquillian-rest-parent
* Add developers/scm info the pom/boms
* Add relativePath to pom parent so Maven can find them
* Remove duplicate entries
* Remove wrong scope
ARQ-1546 prepare release 1.0.0.Alpha1
ARQ-1546 prepare for next development iteration
README for parent and client.