Update README.md

README.md

 # Syntax-Derived Editor for ES Tools
 
 #### Editors
-* OSS
-  * Contract
-  * Contract.Expression
+* [OSS](/eu.fbk.tools.editor/eu.fbk.tools.editor.oss)
+  * [Contract](/eu.fbk.tools.editor/eu.fbk.tools.editor.contract)
+  * [Expression](/eu.fbk.tools.editor/eu.fbk.tools.editor.contract.expression)
 * NuSMV
 * Fei
 * Tfpg