using FAST feature detector. static link libjtclip.so

1. 使用FAST特征点检测器，解除对libnonfree的依赖。用PC测试图片[b1.jpg](http://code.taobao.org/svn/tclip/trunk/demo_images/b1.jpg)结果如下
>SURF 
>cost time: 0.068281s
>![surf](https://f.cloud.github.com/assets/1220143/1672598/9179af7e-5cd5-11e3-8c91-2bb68b7fddcd.jpg)
>FAST 
>cost time: 0.002159s
>![fast](https://f.cloud.github.com/assets/1220143/1672605/a28e715a-5cd5-11e3-9615-b91f1002f07a.jpg)


2. 使用静态链接libjtclip库，减小发布体积。