Minor tweaks to doc build script

appveyor.yml

@@ -90,7 +90,10 @@ for:
                 #if ($lastexitcode -ne 0){
                 #    throw [System.Exception] "docfx build failed with exit code $lastexitcode."
                 #}
-                & .\build.ps1
+                powershell .\build.ps1
+                if ($lastexitcode -ne 0){
+                    throw [System.Exception] "docfx build failed with exit code $lastexitcode."
+                }
             }
             
             if ($env:APPVEYOR_REPO_TAG -eq "true")

docs/build.ps1

@@ -1,15 +1,15 @@
-& docfx metadata
-
 # read SelfConfig, remove wierd bits, load it, load Newtonsoft, and turn it into a schema
-$newtonsoftLoc = "./nuget/Newtonsoft.Json.12.0.2/lib/netstandard2.0/Newtonsoft.Json.dll"
-$newtonsoftSchemaLoc = "./nuget/Newtonsoft.Json.Schema.3.0.11/lib/netstandard2.0/Newtonsoft.Json.Schema.dll"
+$newtonsoftLoc = "$(pwd)/nuget/Newtonsoft.Json.12.0.2/lib/netstandard2.0/Newtonsoft.Json.dll"
+$newtonsoftSchemaLoc = "$(pwd)/nuget/Newtonsoft.Json.Schema.3.0.11/lib/netstandard2.0/Newtonsoft.Json.Schema.dll"
 $selfConfigLoc = "../IPA.Loader/Config/SelfConfig.cs"
 
 if (!(Test-Path "nuget" -PathType Container)) {
-    nuget install Newtonsoft.Json -Version 12.0.2 -source https://api.nuget.org/v3/index.json -o nuget
-    nuget install Newtonsoft.Json.Schema -Version 3.0.11 -source https://api.nuget.org/v3/index.json -o nuget
+    nuget install Newtonsoft.Json -Version 12.0.2 -source https://api.nuget.org/v3/index.json -o "$(pwd)/nuget"
+    nuget install Newtonsoft.Json.Schema -Version 3.0.11 -source https://api.nuget.org/v3/index.json -o "$(pwd)/nuget"
 }
 
+& docfx metadata
+
 if ((Test-Path $newtonsoftLoc -PathType Leaf) -and (Test-Path $selfConfigLoc -PathType Leaf)) {
     # The files we need exist, lets do this!