Add missing file for cmake

cmake/FindSphinxModule.cmake

+# Search for a particular sphinx module.
+#
+# Usage
+# -----
+# find_sphinx_module(parent module_name REQUIRED)
+#
+# parent == sphinx or sphinxcontrib
+# module_name == name of the required module.
+#
+# Example:
+#
+# find_sphinx_module(sphinxcontrib bibtex)
+#
+# will try in python :
+# from sphinxcontrib import bibtex
+#
+function(find_sphinx_module parent module)
+	string(TOUPPER ${module} module_upper)
+	if(ARGC GREATER 1 AND ARGV1 STREQUAL "REQUIRED")
+	  set(${module}_FIND_REQUIRED TRUE)
+	endif()
+	execute_process(COMMAND ${PYTHON_EXECUTABLE} -c
+	  "import re; from ${parent} import ${module}; print re.compile('/__init__.py.*').sub('',${module}.__file__)"
+	  RESULT_VARIABLE _${module}_status
+	  OUTPUT_VARIABLE _${module}_location
+	  ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    	if(NOT _${module}_status)
+	  set(python_${module_upper} ${_${module}_location} CACHE STRING
+	    "Location of Python module ${module}")
+	endif(NOT _${module}_status)
+	if(NOT _${module}_location)
+	  message(FATAL_ERROR "Could not find sphinx ${module}")
+	endif()
+	find_package_handle_standard_args(${module} DEFAULT_MSG _${module}_location)
+	set(${module}_FOUND ${${module_upper}_FOUND} PARENT_SCOPE)
+endfunction()