added logout spec

README.md

@@ -134,7 +134,7 @@ triggered by setting POST parameter 'submitSensorData' to a JSON encoded string
 - reply structure: (JSON object)
     - header: (int) indicating if the request was successfull (mostly like HTTP status codes)
     - body:   (mixed)(optional) containing further data depending on the request
-    
+---
 ### login
 submit username and password to get a session token which can be used to authenticate any further commands
 #### Request
@@ -147,8 +147,22 @@ submit username and password to get a session token which can be used to authent
     - 200: OK
     - 400: invalid request
     - 401: invalid username or password
-- body: (string) (only set when header is 200) Session-token
+- body: (string) (only set when header is 200) session-token
+---
+### logout
+submit session token to destroy the session
+#### Request
+- header: 1002
+- body: (string) session-token
+#### Reply
+- header: (int)
+    - 200: OK
+    - 400: invalid request
+    - 401: invalid session-token
 
+#### Reply
+- header: (int)
+---
 ### get user information
 submit a sesion token to check if it s valid and get some information about the user if it is
 #### Request
@@ -162,3 +176,5 @@ submit a sesion token to check if it s valid and get some information about the
 - body: (object) (only set when header is 200)
     - username: (string) username of the user the session belongs to
     - realname: (string) full name of the user the session belongs to
+
+