Restore accidental change to package documentation

Author: carolynvs

src/corelib/corelib.nuspec

@@ -26,7 +26,7 @@
     <!-- Runtime libraries -->
     <file src="bin\v4.0\$Configuration$\deploy\openstacknet.dll" target="lib\net45"/>
     <file src="bin\v4.0\$Configuration$\deploy\openstacknet.pdb" target="lib\net45"/>
-    
+    <file src="..\..\artifacts\docs\Api\v4.0\openstacknet.xml" target="lib\net45"/>
 
   </files>
 </package>