title: cmake does not find qt 5.1.1
body: <p>I just installed the Qt 5.1.1 for Windows 32-bit (MinGW 4.8, OpenGL) and tried to add it to my cmake. But CMake just does not want to find it and i dont know why. What am i missing? Do i need to set an environment variable or something? </p>
  
  <p>Here is my cmake :</p>
  
  <pre><code>cmake_minimum_required( VERSION 2.8.11 )
  PROJECT(Blemmer)
  # Find includes in corresponding build directories
  set(CMAKE_INCLUDE_CURRENT_DIR ON)
  # Instruct CMake to run moc automatically when needed.
  set(CMAKE_AUTOMOC ON)
  # Detect and add SFML
  set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules" ${CMAKE_MODULE_PATH})
  
  set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin )
  set( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib )
  find_package(SFML REQUIRED system window graphics network audio)
  # The QUIET option disables messages if the package cannot be found. 
  FIND_PACKAGE(Qt5Widgets) 
  add_subdirectory(Entity)
  add_subdirectory(Engine)
  add_subdirectory(Game)
  add_executable(Blemmer main.cpp)
  
  include_directories(${SFML_INCLUDE_DIR} ${PROJECT_SOURCE_DIR})
  target_link_libraries(Blemmer ${SFML_LIBRARIES} Game Engine Qt5::Widgets)
  </code></pre>
  
  <p>and this is the output of cmake-gui :</p>
  
  <pre><code>CMake Warning at CMakeLists.txt:14 (FIND_PACKAGE):
    By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project
    has asked CMake to find a package configuration file provided by
    "Qt5Widgets", but CMake did not find one.
  
    Could not find a package configuration file provided by "Qt5Widgets" with
    any of the following names:
  
      Qt5WidgetsConfig.cmake
      qt5widgets-config.cmake
  
    Add the installation prefix of "Qt5Widgets" to CMAKE_PREFIX_PATH or set
    "Qt5Widgets_DIR" to a directory containing one of the above files.  If
    "Qt5Widgets" provides a separate development package or SDK, be sure it has
    been installed.
  </code></pre>