adds sys requirements

Documentation/Installation/index.md

@@ -2,6 +2,9 @@
 
 _Covers the different ways to install Umbraco. We recommend you either use Microsoft Platform installer or Microsoft Webmatrix as an easy way to get started with Umbraco._
 
+##[System requirements](system-requirements.md)
+Defines the system requirements to run Umbraco
+
 ##[Manual installation](install-umbraco-manually.md)
 Goes through the steps needed to either download a stable release or a nightly version, unzipping, and getting it running on a local webserver.
 

Documentation/Installation/system-requirements.md

@@ -0,0 +1,52 @@
+#System Requirements
+
+##Hosting
+###Umbraco 6.x.x
+
+* IIS6+ (IIS 7 Preferred)
+* SQL CE, SQL Server 2008 (Express and higher) or MySQL
+* ASP.NET 4
+Medium-Trust/Full-Trust (Should work in Medium-Trust environments, but Full-Trust is still preferred)
+* Ability to set file permissions to include create/read/write (or better) for the user that "owns" the Application Pool for your site (NETWORK SERVICE, typically)
+
+###Umbraco 4.7.x
+
+* IIS 6+  (IIS 7 Preferred)
+* SQL CE, SQL Server 2008 (Express and higher) or MySQL
+* ASP.NET 4, MVC 3
+* Medium-Trust/Full-Trust (Should work in Medium-Trust environments, but Full-Trust is still preferred)
+* Ability to set file permissions to include create/read/write (or better) for the user that "owns" the Application Pool for your site (NETWORK SERVICE, typically)
+
+###Umbraco 4.6.x (Codename JUNO)
+
+* IIS 6+ (IIS 7 Preferred)
+* SQL Server 2005+
+* ASP.NET 4
+* Medium-Trust/Full-Trust (Should work in Medium-Trust environments, but Full-Trust is still preferred)
+* Ability to set file permissions to include create/read/write (or better) for the user that "owns" the Application Pool for your site (NETWORK SERVICE, typically)
+* Possible to run in virtual directory, though still recommended not to
+
+###Umbraco 4.5.x
+
+* IIS 6+ (IIS 7 Preferred)
+* SQL Server 2005+
+* ASP.NET 3.5+ (ASP.NET 4.0 Preferred)
+* Medium-Trust/Full-Trust (Should work in Medium-Trust environments, but Full-Trust is still preferred)
+* Ability to set file permissions to include create/read/write (or better) for the user that "owns" the Application Pool for your site (NETWORK SERVICE, typically)
+* Possible to run in virtual directory, though still recommended not to
+
+###Umbraco 4.0.x
+
+* IIS 6+
+* SQL Server 2005+
+* ASP.NET 2.0+
+* Full-Trust (High-Trust is the minimum; Medium-Trust will not work)
+* Ability to set file permissions to include create/read/write (or better) for the user that "owns" the Application Pool for your site (NETWORK SERVICE, typically)
+* Virtual directories are not supported
+
+##Browsers
+The Umbraco UI should work in all modern browsers, however the following are preferred:
+
+* Firefox (Latest)
+* Chrome (Latest)
+* IE7+