revert npm 3 to npm 2 for vagrant installs; adjust instructions so novice users don't try to run commands before doing 'vagrant ssh'

vagrant_scripts/install_node.sh

@@ -16,7 +16,7 @@ nvm use
 nvm alias default current
 
 echo Update npm...
-npm install -g npm@3
+npm install -g npm@2
 
 echo Installing global modules...
 npm install -g gulp bower grunt-cli mocha

vagrant_scripts/vagrant.sh

@@ -65,7 +65,7 @@ apt-get install -qq ntp
 echo Installing nvm, node and global node modules...
 /vagrant/vagrant_scripts/install_node.sh
 
-echo All done! run npm install to install the required node modules and then npm start to start the server
+echo "'vagrant up' is finished. Continue with the instructions at http://habitica.wikia.com/wiki/Setting_up_Habitica_Locally"
 
 # Uncomment both lines to autostart the habitica server when provisioning
 # echo Starting Habitica server...