add another way to define functions to bash (fix #380)

bash.html.markdown

@@ -117,7 +117,7 @@ done
 
 # You can also define functions
 # Definition:
-foo ()
+function foo ()
 {
     echo "Arguments work just like script arguments: $@"
     echo "And: $1 $2..."
@@ -125,6 +125,13 @@ foo ()
     return 0
 }
 
+# or simply
+bar ()
+{
+    echo "Another way to declare functions!"
+    return 0
+}
+
 # Calling your function
 foo "My name is" $NAME