Allow specifying iconUrl

[bjarnef]

In the latest versions of Umbraco, I think when the new packager was implemented in developer section, the package.xml has a iconUrl, which is used when uploading a local package (.zip) in Umbraco backoffice.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<umbPackage>
  <files />
  <info>
    <package>
      <name>Test</name>
      <version>1.0.0</version>
      <iconUrl />
      <license url="http://opensource.org/licenses/MIT">MIT License</license>
      <url>http://our.umbraco.org</url>
      <requirements type="strict">
        <major>7</major>
        <minor>5</minor>
        <patch>9</patch>
      </requirements>
    </package>
    <author>
      <name>Bjarne Fyrstenborg</name>
      <website>www.bjarnefyrstenborg.dk</website>
    </author>
    <readme><![CDATA[]]></readme>
  </info>
  <DocumentTypes />
  <Templates />
  <Stylesheets />
  <Macros />
  <DictionaryItems />
  <Languages />
  <DataTypes />
</umbPackage>