Stomppy v4

Resolves #7.

Main change on line 19, other changes to spec file to facilitate test build.

- Set requirement for stomppy < 4.0.0 in rpmbuild spec file as versions >=
  4.0.0 are currently incompatible with SSM (proplem raised by a SUSE
  user). The versions of stomppy currently available in all the EPEL
  repositories are no greater than 3.1.6.