Resubmit pvr.wmc addon to official pvr addons repo (Frodo branch) (squashed)

Similar to PR #247 for pvr.wmc addon into Gotham, this is the pvr.wmc addon incorporated into the frodo branch.  I figured I may as well submit the PR for the frodo branch incase it can get in for Frodo 12.3 release.  Otherwise we will just continue to use our repo's pvr.wmc_frodo branch to produce builds of this addon for frodo users

All the details provided in #247 are applicable here, with the exception that the Get/Set Resume support and SignalStatus support are deliberately not implemented in Frodo.