more specs for service type
fallback into checking running process if service is not registered
adding command type support for windows, i.e. ability to invoke commands through a powershell console and check the output
renamed and updated windows support doco
added windows spec for new version of command
refactored powershell script to check file access rules
added specs for windows registry keys and fixed bug with dword type value conversion
fixed hex to int conversion problem due to difference between ruby 1.8.7 and 1.9.3
Merge pull request #282 from smontanari/windows-support

Windows: support for testing commands, plus a fix around windows registry key