Merge pull request #1 from kanzure/chrootreadmeupdate1

Additional instructions for chroot users

README.md

@@ -131,10 +131,13 @@ wget http://diyhpl.us/~bryan/irc/nanoengineer/nanoengineer-chroot.tar.gz
 # extract the chroot
 tar -zxvf nanoengineer-chroot.tar.gz
 
+# mount these things if you want the GUI to work
+for i in tmp proc dev; do sudo mount --bind /$i nanoengineer-chroot/$i; done
+
 # jump in
 sudo chroot nanoengineer-chroot/
 
-# run nanoengineer
+# now run nanoengineer
 su nanoengineeruser -c "python ~/code/nanoengineer/cad/src/main.py"
 ```