Added Doxygen 1.8.8

<?xml version="1.0"?>
<interface xmlns="http://zero-install.sourceforge.net/2004/injector/interface" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://zero-install.sourceforge.net/2004/injector/interface http://0install.de/schema/injector/interface/interface.xsd http://0install.de/schema/desktop-integration/capabilities http://0install.de/schema/desktop-integration/capabilities/capabilities.xsd">
  <name>Doxygen</name>
  <summary xml:lang="en">generate documentation from source code</summary>
  <homepage>http://www.stack.nl/~dimitri/doxygen/</homepage>
  <needs-terminal/>
  <feed-for interface="http://0install.de/feeds/Doxygen.xml"/>
  <group license="GPL v2 (GNU General Public License)">
    <command name="run" path="doxygen.exe"/>
    <command name="doxyindexer" path="doxyindexer.exe"/>
    <implementation arch="Windows-i486" id="sha1new=982df9a169a417288d8824288ec4878419600bdf" released="2014-08-21" version="1.8.8">
      <manifest-digest sha256new="7IBWQBPELV264SQA5EZR7LIPUADSKJJRSQEVDPV4H4W2REBXJD4Q"/>
      <archive href="http://ftp.stack.nl/pub/users/dimitri/doxygen-1.8.8.windows.bin.zip" size="7431671" type="application/zip"/>
    </implementation>
    <implementation arch="Windows-x86_64" id="sha1new=35be2eaa94a4316adab6e16b3fa45785566d00c4" released="2014-08-21" version="1.8.8">
      <manifest-digest sha256new="PUVX4RJFIR57FNZSUHNGJ4GEFC2SFO2OH7UZISKXMG3BVUFLXY5Q"/>
      <archive href="http://ftp.stack.nl/pub/users/dimitri/doxygen-1.8.8.windows.x64.bin.zip" size="9462618" type="application/zip"/>
    </implementation>
  </group>
</interface>