Bump down version of org.apache.felix.scr.annotations from 1.9.6 to

1.6.0.  Bump version of maven-compiler-plugin from 2.3.2 to 3.2 and set
the source and target java version to 1.6 from 1.5.  Bump down version
of maven-scr-plugin from 1.20.0 to 1.7.2 to address issue #9