message: Fix Qt5 issue for conda
diff: cmake_minimum_required(VERSION 2.8)
  project(GudhUI)
  +# Need to find OpenGL first as find_package(Qt5) tries to #include"GL/gl.h" on some platforms
  +find_package(OpenGL)
  +
  +if (OPENGL_FOUND)
  find_package(Qt5 COMPONENTS Widgets Xml OpenGL)
  find_package(QGLViewer)
  -find_package(OpenGL)
  -if ( CGAL_FOUND AND Qt5_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND AND NOT CGAL_VERSION VERSION_EQUAL 4.8.0)
  + if ( CGAL_FOUND AND Qt5_FOUND AND QGLVIEWER_FOUND AND NOT CGAL_VERSION VERSION_EQUAL 4.8.0)
  set(CMAKE_AUTOMOC ON)
  set(CMAKE_AUTOUIC ON)
  @@ -35,3 +38,4 @@ if ( CGAL_FOUND AND Qt5_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND AND NOT CGAL_
  install(TARGETS GudhUI DESTINATION bin)
  endif()
  +endif(OPENGL_FOUND)
  \ No newline at end of file
  