uselog_rs

before using uselog_rs, you must use four lines code to use log for outputing log in test mode and not test mode

```

[cfg(not(test))]

use log::{debug, info, warn};

[cfg(test)]

use std::{println as debug, println as info, println as warn}; ``` now just one line code

uselog!(debug, info, warn)

but you need to add uselog_rs to your parent module first like ```

[macro_use(uselog)]

extern crate uselog_rs; ```