title: How to install Qt on Windows after building?
body: <p>I can't find any information on how to install Qt built on Windows.<br>
  In wiki article <a href="http://developer.qt.nokia.com/wiki/Qt_shadow_builds" rel="noreferrer">How to set up shadow builds on Mac and Linux</a> there's description of <code>-prefix</code> option in <code>configure</code> script but this option is not available on Windows.<br>
  I know I can use Qt right from the build folder but it does not seem the right thing not to perform an install step. One problem with this approach is size; Qt's build folder takes about 4GB space whereas after installing using binary installer Qt takes about 1GB space. I guess the difference is due to temporary files created during building. I hope some install procedure would install (copy) only needed files leaving temporary files in the build folder.</p>