Add info to README

Author: torokmark

README.md

@@ -44,14 +44,27 @@ $ cd design_patterns_in_typescript
 $ tsc
 ```
 
-There is a new `tsconfig.json` file in the root directory which is responsible for the compiler options.
+There is a `tsconfig.json` file in the root directory which is responsible for the compiler options.
+
 As it is set the default target is Ecmascript5 now.
+
 Any additional options come here.
 
+By default the output is a `patterns.js` file.
+
+
 To compile only one pattern, use the following command.
 
 ```
 $ cd design_patterns_in_typescript/visitor
-$ tsc --target ES5 visitor.ts
+$ tsc --target ES5 --module system --outFile visitor.js visitor.ts
+```
+
+## Execute the project
+
+After the compilation of the project, a `patterns.js` is generated by default.
+Executing the file is:
+
+```
+node patterns.js
 ```
-> Here if there is no `--outFile` option then the compiler generates the js counterpart into the current directory.