Generate Pinned Site Metadata for win8/10 compatibility

[san650]

See https://msdn.microsoft.com/en-us/library/bg183312(v=vs.85).aspx and https://msdn.microsoft.com/en-us/library/gg491732(v=VS.85).aspx

e.g. using meta tags

<meta name="application-name" content="Channel 9 Audio Player">
<meta name="msapplication-tooltip" content="Channel 9 Podcasts">
<meta name="msapplication-window" content="width=1024;height=768">
<meta name="msapplication-navbutton-color" content="#FF3300">
<meta name="msapplication-starturl" content="/">

e.g. using browserconfig.xml

<?xml version="1.0" encoding="utf-8"?>
<browserconfig>
  <msapplication>
    <tile>
      <square70x70logo src="images/smalltile.png"/>
      <square150x150logo src="images/mediumtile.png"/>
      <wide310x150logo src="images/widetile.png"/>
      <square310x310logo src="images/largetile.png"/>
      <TileColor>#009900</TileColor>
    </tile>
    <notification>
      <polling-uri  src="notifications/contoso1.xml"/>
      <polling-uri2 src="notifications/contoso2.xml"/>
      <polling-uri3 src="notifications/contoso3.xml"/>
      <frequency>30</frequency>
      <cycle>1</cycle>
    </notification>
  </msapplication>
</browserconfig>

It would be nice to have an option to turn off the generation of these metadata. The app might already have a browserconfig.xml in place and we don't want to override it.

[san650]

@YoranBrondsema did the initial implementation for this feature on #66. We can set the application name, tile background color and icon. Now we can start adding more and more options for this.

<meta name="msapplication-tooltip" content="Channel 9 Podcasts">
<meta name="msapplication-window" content="width=1024;height=768">
<meta name="msapplication-navbutton-color" content="#FF3300">
<meta name="msapplication-starturl" content="/">

We can fill these metadata using the values from the manifest and allow the user to override.