(GH-29) Correcting uploading of artifacts

- Not entirely sure why this isn't working, but to work around issue for
now, let's use Test-Path, and if the path doesn't exist, ignore it for
now.

Author: Gary Ewan Park

BuildScripts/default.ps1

@@ -591,7 +591,7 @@ Task -Name RunCodeCoverage -Description "Use OpenCover, NUnit and Coveralls to a
 		Write-Output ("************ RunCodeCoverage Successful ************");
   }	catch {
     Write-Error $_
-    Write-Output ("************ PackageChocolatey Failed ************")
+    Write-Output ("************ RunCodeCoverage Failed ************")
   }
 }
 
@@ -632,7 +632,15 @@ Task -Name PackageChocolatey -Description "Packs the module and example package"
 
 			if(isAppVeyor) {
         Get-ChildItem $buildArtifactsDirectory -Filter *.nupkg | Foreach-Object {
-          Push-AppveyorArtifact ($_ | Resolve-Path).Path;
+          $nugetPath = ($_ | Resolve-Path).Path;
+          
+          if(Test-Path $nugetPath) {
+            Write-Output "Pushing artifact to AppVeyor...";
+            Push-AppveyorArtifact $nugetPath;
+            Write-Output "AppVeyor Upload completed.";
+          } else {
+            Write-Output "Unable to find path of artifact, so can't upload."
+          }
         }
 			}
 		}