bump version to 1.5.9

Author: martin2250

Diff for: OpenCNCPilot/Properties/AssemblyInfo.cs

@@ -49,5 +49,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.5.8.0")]
-[assembly: AssemblyFileVersion("1.5.8.0")]
+[assembly: AssemblyVersion("1.5.9.0")]
+[assembly: AssemblyFileVersion("1.5.9.0")]