update readme add link to project page

Author: bencao

README.md

@@ -5,18 +5,13 @@
 a rewrite of classic FC game "90 Tank" using coffee script
 
 ##Run the game
-I assume you got git and python installed on your machine.
-```bash
-git clone https://github.com/bencao/fc_tank.git fc_tank
-cd fc_tank
-python -m SimpleHTTPServer
-```
-open your browser and visit "http://localhost:8000", you'll find it!
+visit [Project Page](http://blog.bencao.it/fc_tank/) to try this game.
 
 ##Contribute
+Dear guys, you're highly welcome to contribute to this project~
 
 ###Source files
-main logic are in src/tank.coffee and src/game.coffee.
+main logic are written in src/tank.coffee and src/game.coffee.
 
 ###Test
 To run test, you need to install [npm](https://npmjs.org/) first. Then