Support every X minute and hour schedules

The windows scheduled_task resources can only run at most once per day. However, the V1 task scheduler API do make it possible to run tasks every X minutes or hours. For example, the following command will create a v1 task to run notepad every 30 minutes:

C:\>schtasks /create /v1 /RU SYSTEM /RP * /st 14:30 /tn runevery5minutes /sc minute /mo 5 /F /tr c:\windows\system32\notepad.exe

INFO: The schedule task "runevery5minutes" will be created under user name ("NT AUTHORITY\SYSTEM").

WARNING: Password will be ignored for "NT AUTHORITY\SYSTEM" user.

This will require a change to the type, to support `minute` and `hourly` trigger types, and changes to the provider to map that to the appropriate TASK_TRIGGER structure: http://msdn.microsoft.com/en-us/library/windows/desktop/aa383618(v=vs.85).aspx