vagrant: Update README (QA, link to wiki & disk space requirement)

README.md

@@ -10,13 +10,15 @@ with a minimal amount of steps, using Vagrant. It is recommended for a first
 installation, as it will save you from many of the common pitfalls of the
 installation process.
 
-1. Install Git: http://git-scm.com/downloads
-2. Install VirtualBox: https://www.virtualbox.org/wiki/Downloads
-3. Install Vagrant: http://www.vagrantup.com/ (Vagrant 1.2.2 or later)
-4. Open a terminal
-5. Download the project: `git clone git://github.com/edx/edx-platform.git`
-6. Enter the project directory: `cd edx-platform/`
-7. Start: `vagrant up`
+1. Make sure you have plenty of available disk space, >5GB
+2. Install Git: http://git-scm.com/downloads
+3. Install VirtualBox: https://www.virtualbox.org/wiki/Downloads (VirtualBox 4.2.14
+   or later)
+4. Install Vagrant: http://www.vagrantup.com/ (Vagrant 1.2.2 or later)
+5. Open a terminal
+6. Download the project: `git clone git://github.com/edx/edx-platform.git`
+7. Enter the project directory: `cd edx-platform/`
+8. Start: `vagrant up`
 
 The last step might require your administrator password to setup NFS.
 
@@ -24,7 +26,8 @@ Afterwards, it will download an image, install all the dependencies and configur
 the VM. It will take a while, go grab a coffee.
 
 Once completed, hopefully you should see a "Success!" message indicating that the
-installation went fine. (If not, refer to the Troubleshooting section below.)
+installation went fine. (If not, refer to the 
+[troubleshooting section](https://github.com/edx/edx-platform/wiki/Simplified-install-with-vagrant#troubleshooting).)
 
 Accessing the VM
 ----------------
@@ -91,34 +94,8 @@ $ vagrant up --no-provision
 Troubleshooting
 ---------------
 
-### Reinstalling
-
-If something goes wrong, you can easily recreate the installation from scratch by
-typing:
-
-```
-$ vagrant destroy -f && vagrant up
-```
-
-This will delete the current VM, create a new VM, re-install all the dependencies,
-and reconfigure.
-
-### "Mounting NFS shared folders failed"
-
-If you get the following error message when you run `$ vagrant up`:
-
-```
-It appears your machine doesn't support NFS, or there is not an
-adapter to enable NFS on this machine for Vagrant. Please verify
-that `nfsd` is installed on your machine, and try again. If you're
-on Windows, NFS isn't supported.
-```
-
-You need to install NFS. Under Debian/Ubuntu, for example:
-
-```
-$ sudo apt-get install nfs-common nfs-kernel-server
-```
+If anything doesn't work as expected, see the 
+[troubleshooting section](https://github.com/edx/edx-platform/wiki/Simplified-install-with-vagrant#troubleshooting).
 
 Installation - Advanced
 =======================