DOC: Keep ITK CMake minimum required version consistency.

Update the ITK CMake minimum required version to the current minimum
required version.

Change-Id: I7b4fa53a3d517f6bb760fde645aeb210cb8b9385

Author: Jon Haitz Legarreta Gorroño

SoftwareGuide/Latex/DevelopmentGuidelines/CreateAModule.tex

@@ -61,7 +61,7 @@ \subsection{CMakeLists.txt}
 contain
 
 \begin{minted}[baselinestretch=1,fontsize=\footnotesize,linenos=false,bgcolor=ltgray]{cmake}
-cmake_minimum_required(VERSION 2.9)
+cmake_minimum_required(VERSION 2.8.12)
 project(MyModule)
 
 set(MyModule_LIBRARIES MyModule)

SoftwareGuide/Latex/Introduction/Installation.tex

@@ -172,7 +172,7 @@ \subsection{Preparing CMake}
 provided on the CMake web page for downloading and installing the software. The
 minimum version of CMake has been evolving along with the version of ITK. For
 example, the current version of ITK (\ITKVERSIONMAJORMINORPATCH) requires the minimum
-CMake version to be 2.8.9.
+CMake version to be 2.8.12.
 
 CMake provides a terminal-based interface (Figure \ref{fig:CMakeGUI})
 on platforms support the \code{curses} library. For most platforms CMake also