introduce virtualization section

_posts/13-01-01-Virtualization.md

@@ -0,0 +1,14 @@
+---
+anchor: virtualization
+---
+
+# Virtualization
+
+Running your application on different environments in development and production can lead to strange bugs 
+popping up when you go live. It's also tricky to keep different development environments up to date with the same 
+version for all libraries used when working with a team of developers. 
+
+If you are developing on Windows and deploying to Linux (or anything non-Windows) or are developing in a team, you 
+should consider using a virtual machine.  
+This sounds tricky, but beside the widely known virtualization environments like VMware or VirtualBox, there are
+additional tools that may help you setting up a virtual environment in a vew easy steps.

_posts/13-02-02-Vagrant.md

@@ -5,13 +5,9 @@ anchor: vagrant
 
 ## Vagrant {#vagrant_title}
 
-Running your application on different environments in development and production can lead to strange bugs 
+[Vagrant][vagrant] helps you building your virtual boxes on top of the known virtual environments and will configure
-popping up when you go live. It's also tricky to keep different development environments up to date with the same 
+these environments based on a single configuration file.
-version for all libraries used when working with a team of developers. 
+These boxes can be set up manually, or you can use "provisioning" 
-
-If you are developing on Windows and deploying to Linux (or anything non-Windows) or are developing in a team, you 
-should consider using a virtual machine. This sounds tricky, but by using [Vagrant][vagrant] you can set up a simple 
-virtual machine with only a few steps. These base boxes can then be set up manually, or you can use "provisioning" 
 software such as [Puppet][puppet] or [Chef][chef] to do this for you. Provisioning the base box is a great way to 
 ensure that multiple boxes are set up in an identical fashion and removes the need for you to maintain complicated 
 "set up" command lists. You can also "destroy" your base box and recreate it without many manual steps, making it