Add support for Node 8.7.0 version

- bash script updated
- README.md updated

Thanks!

README.md

@@ -84,6 +84,12 @@ $ wget -O - https://raw.githubusercontent.com/sdesalas/node-pi-zero/master/insta
 $ wget -O - https://raw.githubusercontent.com/sdesalas/node-pi-zero/master/install-node-v8.5.0.sh | bash
 ```
 
+## v8.7.0
+
+```sh
+$ wget -O - https://raw.githubusercontent.com/sdesalas/node-pi-zero/master/install-node-v8.7.0.sh | bash
+```
+
 ## v.lts
 
 ```sh

install-node-v8.7.0.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# By Steven de Salas
+
+# Based on script by Richard Stanley @ https://github.com/audstanley/Node-MongoDb-Pi/
+# This is for a RaspberryPi Zero but should work across all models.
+
+VERSION=v8.7.0;
+
+# Creates directory for downloads, and downloads node
+cd ~/ && mkdir temp && cd temp;
+wget https://nodejs.org/dist/$VERSION/node-$VERSION-linux-armv6l.tar.gz;
+tar -xzf node-$VERSION-linux-armv6l.tar.gz;
+# Remove the tar after extracing it.
+sudo rm node-$VERSION-linux-armv6l.tar.gz;
+# This line will clear existing nodejs
+sudo rm -rf /opt/nodejs;
+# This next line will copy Node over to the appropriate folder.
+sudo mv node-$VERSION-linux-armv6l /opt/nodejs/;
+# Remove existing symlinks
+sudo unlink /usr/bin/node;
+sudo unlink /usr/sbin/node;
+sudo unlink /sbin/node;
+sudo unlink /usr/local/bin/node;
+sudo unlink /usr/bin/npm;
+sudo unlink /usr/sbin/npm;
+sudo unlink /sbin/npm;
+sudo unlink /usr/local/bin/npm;
+# Create symlinks to node && npm
+sudo ln -s /opt/nodejs/bin/node /usr/bin/node;
+sudo ln -s /opt/nodejs/bin/node /usr/sbin/node;
+sudo ln -s /opt/nodejs/bin/node /sbin/node;
+sudo ln -s /opt/nodejs/bin/node /usr/local/bin/node;
+sudo ln -s /opt/nodejs/bin/npm /usr/bin/npm;
+sudo ln -s /opt/nodejs/bin/npm /usr/sbin/npm;
+sudo ln -s /opt/nodejs/bin/npm /sbin/npm;
+sudo ln -s /opt/nodejs/bin/npm /usr/local/bin/npm;