Change documentation to LabOP

[jakebeal]

The README currently says PAML and not LabOP. This should be updated.

This also will resolve a question of capitalization: is it "LabOPed"? LABOPed"? "LabOPEd?" "laboped"? Something else?

[bbartley]

One idea is to simply call it "OPed" -- "Open Protocol editor"