Changes since 2.21
------------------
+ * Existing services can now be managed using the GUI
+ or on the command line.
+
+ * NSSM can now set the priority class of the managed
+ application.
+
* NSSM can now optionally rotate existing files when
redirecting I/O.
* Unqualified path names are now relative to the
application startup directory when redirecting I/O.
+ * NSSM can now set the service display name, description,
+ startup type and log on details.
+
Changes since 2.20
------------------
* Services installed from the GUI no longer have incorrect