csyangchen

struct marshal gives me extra space before the first field

2

for some struct type, take this one for example: type T struct { A string `json:"a"` B []int `json:"b,omitempty"` } ffjson MarshalJSON gives me output like this: { "a":"123"} //...

Thought might be useful to add the `ActiveCount() int` method (or `IdleCount() int` maybe, seems active conns are not counted). [redigo](https://github.com/garyburd/redigo/blob/95d11dba2d44531bdb8022752b98912baafae03a/redis/pool.go#L185) has `ActiveCount() int` and `IdleCount() int`, which we use...