use UTF-8 encoding (without BOM)

Author: enricosada

src/fsharp/FSStrings.resx

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 

src/fsharp/FSharp.Core.Unittests/App.xaml

@@ -1,4 +1,4 @@
-<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
              x:Class="FSharp.Core.UnitTests.TestApp.App"
              >

src/fsharp/FSharp.Core.Unittests/FSharp.Core/Microsoft.FSharp.Control/App.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <configuration>
     <startup> 
         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />

src/fsharp/FSharp.Core.Unittests/Properties/AppManifest.xml

@@ -1,4 +1,4 @@
-<Deployment xmlns="http://schemas.microsoft.com/client/2007/deployment"
+<Deployment xmlns="http://schemas.microsoft.com/client/2007/deployment"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 >
     <Deployment.Parts>

src/fsharp/FSharp.Core/FSCore.resx

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema