Add error message with cmake 3.6.

Author: egorpugin

CMakeLists.txt

@@ -10,6 +10,10 @@
 
 cmake_minimum_required(VERSION 2.8.11)
 
+if (WIN32 AND CMAKE_VERSION VERSION_EQUAL 3.6 OR (CMAKE_VERSION VERSION_GREATER 3.6 AND CMAKE_VERSION VERSION_LESS 3.7))
+    message(FATAL_ERROR "You have bugged CMake version 3.6 which is known to not work with tesseract. Please, upgrade CMake.")
+endif()
+
 # In-source builds are disabled.
 if (${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
     message(FATAL_ERROR