emphasise SSH

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

README

@@ -31,7 +31,7 @@ Here are some features that makes it unique:
 Keywords | Description
 Simplicity | There is only one type to extend cdist called ***type***
 Design | Type and core cleanly seperated
-Design | cdist sticks completly to the KISS (keep it simple and stupid) paradigma
+Design | Sticks completly to the KISS (keep it simple and stupid) paradigma
 Design | Meaningful error messages - do not lose time debugging error messages
 Design | Consistency in behaviour, naming and documentation
 Design | No surprise factor: Only do what is obviously clear, no magic
@@ -40,8 +40,8 @@ Small core | cdist's core is very small - less code, less bugs
 Fast development | Focus on straightforwardness of type creation is a main development objective
 Requirements, Scalability | No central server needed, cdist operates in push mode and can be run from any computer
 Requirements, Scalability, Upgrade | cdist only needs to be updated on the master, not on the target hosts
-Requirements | cdist requires only SSH and a shell on the target
-Requirements | 
+Requirements, Security | Uses well-know [SSH](http://www.openssh.com/) as transport protocol
+Requirements, Simplicity | Requires only shell and SSH server on the target
 UNIX | Reuse of existing tools like cat, find, mv, ...
 UNIX, familar environment, documentation | Is available as manpages and HTML
 UNIX, simplicity, familar environment | cdist is written in POSIX shell