Add printer and printer_port LWRPs

Conflicts:
	providers/printer.rb
	resources/printer.rb
Add license headers and author info.
Add why-run support to printer_port provider
Add why-run support to printer provider
Add depends 'powershell' to cookbook metadata

Printer and printer_port providers depend on the PowerShell resource
Polish printer and printer_port LWRPs
Merge pull request #19 from Nordstrom/cook-2142

Cook 2142: Add Windows Printer and Printer Port LWRPs