Extra field if username is empty

Typo in the printout of some level's prefixes

udpate ini.go

Update file.go

Print error if occurred in WriteMsg

Allow mail with self-signed certificates

For more information, refer to https://groups.google.com/forum/#!topic/golang-nuts/c9zEiH6ixyw

New pull request for "Panic sometimes occurs at time 00h00 on windows, then the app crashes."

Signed-off-by: devYu <devysq@gmail.com>

1. 去掉重复的ToLower
2. getData内部统一ToLower
3.调整getData中对空字符串判断位置
====
4. 待确定：在getData中是否有必要进行lock操作

Added data table admin ui

improve and typo fixed

bug fixed

Conflicts:
	httplib/httplib.go

Add support for basic type pointer fields

Update README

Allows models like:

```
type User struct {
	Id    int64
	Name  string
	Email *string `orm:"null"`
}
```

This helps a lot when doing JSON marshalling/unmarshalling.

Pointer fields should always be declared with the NULL orm tag for sanity, this
probably requires documentation.