Move build to the separate directory

.gitignore

@@ -4,8 +4,7 @@ Makefile
 cmake_install.cmake
 install_manifest.txt
 
-matabstrix.html
-matabstrix.js
-matabstrix.data
+/build/**/*
+!/build/.keep
 
 *.blend1

CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required (VERSION 3.0)
 set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
 
+set (CMAKE_RUNTIME_OUTPUT_DIRECTORY "build")
+
 project (Matabstrix)
 add_definitions ("-std=c++14 -Wall -Wextra")
 set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "--use-preload-plugins --preload-file data")