Baseline checkin

Self-installing service created and working.  NLog added.  Connection to
EWS API added and working.  Initial configuration working.  Requires
[EWS API
2.2](http://www.microsoft.com/en-us/download/details.aspx?id=42951).
Unfortunately, no NuGet package is available.  I might just take matters
into my own hands and package here.