Revert un-intended change to examples

Revert un-intended changed to the size of tangle field in isosurface example and the requirements on CMake version for game_of_life.

examples/game_of_life/CMakeLists.txt

@@ -20,7 +20,7 @@
 ##
 ##=============================================================================
 
-#cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
 project(GameOfLife CXX)
 
 #Find the VTK-m package

examples/isosurface/IsosurfaceUniformGrid.cxx

@@ -48,7 +48,7 @@
 
 #include <vector>
 
-static vtkm::Id3 dims(4, 4, 4);
+static vtkm::Id3 dims(256, 256, 256);
 static vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32, 3>> verticesArray, normalsArray;
 static vtkm::cont::ArrayHandle<vtkm::Float32> scalarsArray;
 static Quaternion qrot;