change: 设计联系人和CallsLog数据库.
Merge pull request #3 from ifay/master

ifay
Merge pull request #4 from ifay/master

add server connection
change: 独立通讯录数据库.
change: 能够发送短信.
change: fix some bug.
change: 删除无用资源,调整UI.
Merge pull request #5 from PittyXu/master

简易通讯录