better readme

Author: dionisiydk

README.md

@@ -12,26 +12,24 @@
 Ghost is framework to implement unnatural smalltalk objects like proxies or prototypes. It provides suitable infrastructure to implement message processing in special way
 
 ## Installation
-Use following script for Pharo version >= 6:
+Use following script for Pharo version >= 10:
 ```Smalltalk
 Metacello new
   baseline: 'Ghost';
   repository: 'github://pharo-ide/Ghost';
   load
 ```
-Notice that Pharo 6 requires manual loading of Tonel format.
-
 To add dependency in your project baseline:
 ```Smalltalk
 spec
     baseline: 'Ghost'
-    with: [ spec repository: 'github://pharo-ide/Ghost:v4.0.?' ]
+    with: [ spec repository: 'github://pharo-ide/Ghost:v6.0.0' ]
 ```
-For old Pharo versions project should be loaded from smalltalkhub:
+Notice that Pharo versions <= 9 were based on GTTools. In current Pharo it was removed and replaced by NewTools project. Ghost requires a dedicated tooling support to be able inspect Ghost objects. In order to use Ghost in old versions of Pharo load pharo9 branch instead of master:
 ```Smalltalk
 Metacello new
-      smalltalkhubUser: 'Pharo' project: 'Ghost';
-      configuration: 'Ghost';
-      version: #stable;
-      load.
+  baseline: 'Ghost';
+  repository: 'github://pharo-ide/Ghost:pharo9';
+  load
 ```
+