Minor cleanup.

Add .dmp files to .gitignore
Let VS2017 fix the formatting of the PyExt.vcxproj.filters

Author: SeanCline

.gitignore

@@ -15,3 +15,6 @@ x86/
 
 # Python artifacts.
 *.pyc
+
+# Unit test artifacts.
+/test/scripts/*.dmp

test/PyExtTest/PyExtTest.vcxproj

@@ -22,7 +22,7 @@
     <VCProjectVersion>15.0</VCProjectVersion>
     <ProjectGuid>{AE750E22-5A8E-401E-A843-B9D56B09A015}</ProjectGuid>
     <RootNamespace>PyExtTest</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.15063.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.17134.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">