* Fixes #236
* Added Windows Support (binary install_method only) using NSSM
  to manage the service. NSSM runs consul as the local SYSTEM user.
  Support for running it as another user can/should be added later.
* Prevented the firewall cookbook from creating rules for disabled
  ports
* Added & Updated spec tests
* Disabled Style/ModuleFunction cop

* Simplified how attributes with paths for values are set
* Changed default values for data_dir attribute to keep everything
  simple
* Added version check to windows binary installation so that it can
  be upgraded

Added a Windows only attribute that allows
cookbook users to override and/or add their own
nssm parameters. Added logic for comparing
nssm parameters as the nssm resource doesn't
currently do this. Reverted the change to the
default path for the data directory. Borrowed
some of these ideas from @gdavison, thanks!

Added exit code 1 as an acceptable return code within
`nssm_service_installed?`. If AppRotateOnline is not set
for nssm, it will only rotate the logs when the service
is restarted. Changed the default nssm parameters so
that logs are rotated when they reach 20 MB in size.

Added a check to start Consul via nssm if it's not running. And
updated consul_definition resource/provider with the new helper
methods.