fixed links in Readme

Readme.org

@@ -35,12 +35,12 @@ Requirements of a Video text format
 #+END_SRC
 
 * Installation
-install npm dependencies using [[https://www.npmjs.com/get-npm][~npm~]]
+install npm dependencies using [[https://www.npmjs.com/get-npm][npm]]
 #+BEGIN_SRC bash
 $ npm install
 #+END_SRC
 
-if javascript is modified, bundle javascript using [[http://browserify.org/][~browserify~]]
+if javascript is modified, bundle javascript using [[http://browserify.org/][browserify]]
 #+BEGIN_SRC bash
 browserify script.js -o bundle.js
 #+END_SRC