Implement plgx file extraction

.gitignore

@@ -31,6 +31,7 @@ _ReSharper*/
 *.resources
 *.userprefs
 *.il
+.vs/
 
 # Ignore NuGet Packages
 *.nupkg

PlgxTools/.gitignore

@@ -0,0 +1 @@
+Microsoft.Build.Plgx.cs

PlgxTools/Microsoft.Build.Plgx.xsd

@@ -3,7 +3,11 @@
  xmlns:msb="http://schemas.microsoft.com/developer/msbuild/2003"
  targetNamespace="http://schemas.microsoft.com/developer/msbuild/2003"
  elementFormDefault="qualified">
+
+  <!-- TODO how to make schemaLocation cross-platform/cross-version compatible? -->
   <xs:include schemaLocation="C:\Program Files (x86)\Microsoft Visual Studio 14.0\Xml\Schemas\1033\Microsoft.Build.xsd" />
+  <xs:include schemaLocation="C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Xml\Schemas\1033\Microsoft.Build.xsd" />
+  <xs:include schemaLocation="/usr/lib/mono/4.5/Microsoft.Build.xsd" />
 
   <!-- Extend Microsoft.Build.xsd to include properties used by PlgxTool.targets -->
   <!-- Also see: http://keepass.info/help/v2_dev/plg_index.html#plgx -->

PlgxTools/Microsoft.Build.Plgx_xsd.cs

@@ -12,12 +12,12 @@ public static string Test(this string test)
       return test;
     }
 
-    public static string GetValue(this PlgxConfigurationPrerequisitesOS version)
+    public static string GetValue(this PropertyGroupTypePropertyPlgxConfigurationPrerequisitesOS version)
     {
       return GetXmlEnumAttribute (version) ?? version.ToString ();
     }
 
-    public static string GetValue(this PlgxConfigurationPrerequisitesPointerSize version)
+    public static string GetValue(this PropertyGroupTypePropertyPlgxConfigurationPrerequisitesPointerSize version)
     {
       return GetXmlEnumAttribute (version) ?? version.ToString ();
     }