Update development guide

05.dev-guide.md

@@ -228,7 +228,7 @@ print_value (const jerry_api_value_t * value_p)
 
 ## Simple JavaScript shell
 
-Now we have build blocks to construct JavaScript shell.
+Now all build blocks, necessary to construct JavaScript shell, are ready.
 
 Shell operation can be described with following loop:
 
@@ -296,4 +296,9 @@ main (int argc, char * argv[]) {
 }
 ```
 
+The application inputs commands and evaluates them, one after another.
+
+
+## Further steps
+
 For further API description, please look at [Embedding API](/API).