add shell command

abra.sh

@@ -35,6 +35,15 @@ customize() {
     done
 }
 
+shell(){
+    if [ -z "$1" ]
+    then
+            echo "Usage: ... shell <python code>"
+            exit 1
+    fi
+    ak shell -c "$1" 2>&1 | quieten
+}
+
 import_user() {
     if [ -z "$1" ]
     then