Add Jitsi to Windows' default applications list

Closes #252

resources/install/windows/SCRegistrySpec.wxi

@@ -23,11 +23,12 @@
   <Component
       Id="Component_UrlCapabilities"
       Directory="TARGETDIR"
-      Guid="5798BE9D-AEA5-4DA8-992E-EEAD03D7E4CB">
-    <RegistryKey Key="Jitsi\Capabilities" Root="HKLM">
+      Guid="5798BE9D-AEA5-4DA8-992E-EEAD03D7E4CB"
+      Win64="no">
+    <RegistryKey Key="Software\Jitsi\Capabilities" Root="HKLM">
       <RegistryValue Name="ApplicationDescription" Type="string" Value="Jitsi, the OpenSource Java VoIP and Instant Messaging client." />
     </RegistryKey>
-    <RegistryKey Key="Jitsi\Capabilities\UrlAssociations" Root="HKLM">
+    <RegistryKey Key="Software\Jitsi\Capabilities\UrlAssociations" Root="HKLM">
       <RegistryValue Name="callto" Type="string" Value="Jitsi.Url" />
       <RegistryValue Name="sip" Type="string" Value="Jitsi.Url" />
       <RegistryValue Name="tel" Type="string" Value="Jitsi.Url" />
@@ -114,7 +115,7 @@
     </RegistryKey>
   	<RegistryKey
         Key="SOFTWARE\IM Providers\@APP_NAME@"
-        Root="HKLM" Action="createAndRemoveOnUninstall">
+        Root="HKLM">
       <RegistryValue
           Name="FriendlyName"
           Type="string"
@@ -163,6 +164,29 @@
   </Component>
   
 <?if $(var.Platform) = x64 ?>
+  <Component
+      Id="Component_UrlCapabilities64"
+      Directory="TARGETDIR"
+      Guid="3de76b6b-90b9-403d-82ac-51d841ea95af"
+      Win64="yes">
+    <RegistryKey Key="Software\Jitsi\Capabilities" Root="HKLM">
+      <RegistryValue Name="ApplicationDescription" Type="string" Value="Jitsi, the OpenSource Java VoIP and Instant Messaging client." />
+    </RegistryKey>
+    <RegistryKey Key="Software\Jitsi\Capabilities\UrlAssociations" Root="HKLM">
+      <RegistryValue Name="callto" Type="string" Value="Jitsi.Url" />
+      <RegistryValue Name="sip" Type="string" Value="Jitsi.Url" />
+      <RegistryValue Name="tel" Type="string" Value="Jitsi.Url" />
+      <RegistryValue Name="xmpp" Type="string" Value="Jitsi.Url" />
+    </RegistryKey>
+    <RegistryKey Key="Software\Classes\Jitsi.Url" Root="HKLM">
+      <RegistryValue
+          Key="shell\open\command"
+          KeyPath="yes"
+          Type="string"
+          Value='"[INSTALLDIR]@APP_LAUNCHER_NAME@.exe" "%1"' />
+    </RegistryKey>
+  </Component>
+
   <Component
       Id="Component_MsOfficeCommRegistryEntries_X64"
       Directory="TARGETDIR"
@@ -180,7 +204,7 @@
     </RegistryKey>
     <RegistryKey
         Key="SOFTWARE\IM Providers\@APP_NAME@"
-        Root="HKLM" Action="createAndRemoveOnUninstall">
+        Root="HKLM">
         <RegistryValue
           Name="FriendlyName"
           Type="string"