Self introduction

Added the function to modify own **self-introduction**.
And, summarize left menu items.

![profile_dialog_with_menu](https://f.cloud.github.com/assets/2914192/1581722/7b135cde-51dc-11e3-8284-09f5b7f1bd2d.png)

![setting_menu](https://f.cloud.github.com/assets/2914192/1581725/872909f6-51dc-11e3-8c82-f4fb0f21e4f1.png)