Windows installer test and service running

The Windows Installer and Service is ready for trial testing.

Caveats:
* Agent upgrades are disabled when run as the service.
* The log file is hard-coded to "C:\ProgramData\Rackspace Monitoring\log.txt" when run as a service.
* The service will start and immediately stop after installation if no configuration file exists.

To create a config file after installation using the command line:

"C:\Program Files (x86)\Rackspace Monitoring\rackspace-monitoring-agent.exe" --setup --username your_username --apikey your_apikey

Then start the Rackspace Monitoring Agent using the Service Manager.