Move platform scripts into platforms

platform/node/scripts/create_node_scheme.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+NAME=$1
+shift
+CMD=$@
+DIR="build/binding.xcodeproj/xcshareddata/xcschemes"
+mkdir -p "${DIR}"
+
+sed "s#{{NODE_PATH}}#$(dirname `which node`)#;s#{{BLUEPRINT_IDENTIFIER}}#$(hexdump -n 12 -v -e '/1 "%02X"' /dev/urandom)#;s#{{WORKING_DIRECTORY}}#$(pwd)#;s#{{NODE_ARGUMENT}}#${CMD}#" platform/node/scripts/node.xcscheme > "${DIR}/${NAME}.xcscheme"