Do not install and execute plugin if a plugin of the same name already exists.
Do not install and execute plugin if a plugin of the same name already exists.

git-svn-id: 55dab261027a0615fa60e6fe1b42a29d056462f7@97 3b289f47-807e-410a-85af-7ee1d5ead6e2

kstephens/cabar