Update readme

README.md

@@ -302,26 +302,27 @@ Get help on a specific command
 <b>Options:</b>
 
 <pre>
-pretty             → use colors
-force              → use force
-async              → run asynchronously (disabled by default because some dists tests are not async safe) 
-dont               → do everything but dont do it (dry run)
-bar                → use progress bar
-spinner            → use spinner
-verbose  < level > → verbosity < nothing error warn info now debug all >
-config   < path >  → specify config file
-recman             → enable all remote recommendation manager
-recman   < MyRec > → use MyRec recommendation manager only
-norecman           → disable all remote recommendation manager
-norecman < MyRec > → use all recommendation managers excepts MyRec
-nopretty           → no colors
-noforce            → no force
-nobar              → no progress bar
-nospinner          → no spinner
-noasync            → dont run asynchronously
-nocache            → disable cache
-yolo               → proceed if error occured (eg. test failure)
-please             → be nice to butterflies
+pretty              → use colors
+force               → use force
+async               → run asynchronously (disabled by default because some dists tests are not async safe) 
+dont                → do everything but dont do it (dry run)
+bar                 → use progress bar
+spinner             → use spinner
+verbose  < level >  → verbosity < nothing error warn info now debug all >
+cores    < number > → number of cores used when running in async mode
+config   < path >   → specify config file
+recman              → enable all remote recommendation manager
+recman   < MyRec >  → use MyRec recommendation manager only
+norecman            → disable all remote recommendation manager
+norecman < MyRec >  → use all recommendation managers excepts MyRec
+nopretty            → no colors
+noforce             → no force
+nobar               → no progress bar
+nospinner           → no spinner
+noasync             → dont run asynchronously
+nocache             → disable cache
+yolo                → proceed if error occured (eg. test failure)
+please              → be nice to butterflies
 </pre>
 
 <b>Examples:</b>
@@ -361,7 +362,7 @@ Options can be set via environment variables as well:
 **General**
 <pre>
 PAKKU_VERBOSE PAKKU_CACHE PAKKU_RECMAN PAKKU_NORECMAN PAKKU_CONFIG PAKKU_DONT
-PAKKU_FORCE PAKKU_PRETTY PAKKU_BAR PAKKU_SPINNER PAKKU_YOLO 
+PAKKU_FORCE PAKKU_PRETTY PAKKU_BAR PAKKU_SPINNER PAKKU_ASYNC PAKKU_CORES PAKKU_YOLO 
 </pre>
 
 **Add**