Add a Make target / test which verifies st2client installs and works fine.
Add a Make target / test which verifies st2client installs and works
fine.

StackStorm/st2,Plexxi/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2,nzlosh/st2,Plexxi/st2,StackStorm/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2