title: cmake ClanLib i can't compile project
body: <pre><code>cmake_minimum_required(VERSION 3.1)
  project(ClanLib)
  
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
  
  SET(ClanLib_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR})
  INCLUDE_DIRECTORIES(${ClanLib_INCLUDE_DIRS})
  FIND_PACKAGE(ClanLib REQUIRED)
  
  set(SOURCE_FILES main.cpp)
  add_executable(ClanLib ${SOURCE_FILES} main.cpp)
  
  TARGET_LINK_LIBRARIES(ClanLib ${ClanLib_LIBRARY})
  </code></pre>
  
  <p>and cmake give error:</p>
  
  <pre><code>Error:By not providing "FindClanLib.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "ClanLib", but CMake did not find one.
  Could not find a package configuration file provided by "ClanLib" with any of the following names:
    ClanLibConfig.cmake   clanlib-config.cmake
  Add the installation prefix of "ClanLib" to CMAKE_PREFIX_PATH or set "ClanLib_DIR" to a directory containing one of the above files.  If "ClanLib" provides a separate development package or SDK, be sure it has been installed.
  </code></pre>