Fix path to node binaries

Author: TheMarex

scripts/install_node.sh

@@ -1,14 +1,16 @@
 #!/usr/bin/env bash
 
-export NODE_HOME=$HOME/node
+NODE_HOME=$HOME/node
+export NODE_HOME
 mkdir ${NODE_HOME}
 if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
   curl https://s3.amazonaws.com/mapbox/apps/install-node/v2.0.0/run | NV=4.4.2 NP=darwin-x64 OD=${NODE_HOME} sh
 else
   curl https://s3.amazonaws.com/mapbox/apps/install-node/v2.0.0/run | NV=4.4.2 NP=linux-x64 OD=${NODE_HOME} sh
 fi
 
-export PATH="${NODE_HOME}:$PATH"
+PATH="${NODE_HOME}/bin:$PATH"
+export PATH
 node --version
 npm --version
 which node