1.增加封装好的等待对话框类
2.增加多账户登录（但是有点儿bug）
3.账户增加到json文件有bug,暂时没测
Merge branch 'develop' of https://github.com/wangwang4git/4MyLove into develop

Conflicts:
	src/com/bbs/whu/activity/LoginActivity.java
	src/com/bbs/whu/utils/MyConstants.java
修改合并后的错误
Merge pull request #11 from ljp215/develop

ljp_增加新功能_2013.1.20