fix
Merge branch 'data2' of ssh://github.com/IbpTeam/demo-rio into data2_xiquan
add:getAllCategories() in filesHandle.js
add : contacts.js
Merge branch 'data2' of ssh://github.com/IbpTeam/demo-rio into data2_xiquan
add:getAllDataByCategories to filesHandle.js
添加category.js，contacts.js，uri.js，path.js文件，fileshandle接口分类。
Merge branch 'data2' of ssh://github.com/IbpTeam/demo-rio into data2_xiquan
add more
Merge pull request #207 from shuanzi/data2_xiquan

Data2_xiquan->wangfeng
clear original db contents
Data-wangyu: clear db file
Merge pull request #209 from wangyufish/Data

Data wangyu->yuanzhe
Merge pull request #210 from v11985/data2_wangfeng

Data2 wangfeng ->yuanzhe