Set minimum CMake version to 3.1.3

Also swapped order of project() declaration and cmake_minimum_required()

CMakeLists.txt

-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.1.3)
 project(eos)
 set(eos_VERSION_MAJOR 0)
 set(eos_VERSION_MINOR 10)

examples/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1.3)
 project(examples)
-cmake_minimum_required(VERSION 2.8.10)
 
 # The examples need a few additional dependencies (e.g. boost filesystem and OpenCV highgui):
 

matlab/CMakeLists.txt

-project(matlab-bindings)
 cmake_minimum_required(VERSION 3.7.0)
+project(matlab-bindings)
 
 # If Matlab_ROOT_DIR is set, the Matlab at that location is used.
 find_package(Matlab COMPONENTS MX_LIBRARY REQUIRED)

python/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1.3)
 project(python-bindings)
-cmake_minimum_required(VERSION 2.8.12)
 
 # The python bindings may need a few additional dependencies (e.g. boost filesystem and OpenCV), which are
 # included below - at some point it should be checked if they are really needed.

utils/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1.3)
 project(utils)
-cmake_minimum_required(VERSION 2.8.12)
 
 # The utils need a few additional dependencies (e.g. boost filesystem and OpenCV highgui):