Bumped min. req. CMake version to fix CMake warnings.

CMakeLists.txt

@@ -1,14 +1,14 @@
 # Set  the minimum  required version  of cmake  for a  project.
-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 2.8.12)
 
 # Add an executable to the project using the specified source files.
 add_executable(tetgen tetgen.cxx predicates.cxx)
 
-#Add a library to the project using the specified source files. 
+#Add a library to the project using the specified source files.
 # In Linux/Unix, it will creates the libtet.a
 add_library(tet STATIC tetgen.cxx predicates.cxx)
 
-#Set properties on a target. 
+#Set properties on a target.
 #We use this here to set -DTETLIBRARY for when compiling the
 #library
-set_target_properties(tet PROPERTIES "COMPILE_DEFINITIONS" TETLIBRARY)
+set_target_properties(tet PROPERTIES "COMPILE_DEFINITIONS" TETLIBRARY)