Add support for remote service admin
Fix typo in previous commit
Change RunService / RunRemoteService to block.

Although the SC command does not wait for the service to finish
executing the service command, we want to at least allow the SC
process to exit so that FAKE doesn't try to kill it. I also changed
it to throw an exception if SC returns a nonzero exist status.
Remove line added by mistake

Also decided to use match instead of if/else
Merge pull request #492 from lasandell/RemoteServiceAdmin

Add support for remote service admin