Make logger to consume args of type Any with slf4 interpolator.

[mosyp]

Fixes #38
When using standard sl4j interpolator and Any args it fails:

logger.debug("test {} and {} and {}", 1, 2, 3)
[error] overloaded method value debug with alternatives:
  (x$1: org.slf4j.Marker,x$2: String,x$3: Object*)Unit 
  (x$1: org.slf4j.Marker,x$2: String,x$3: Any,x$4: Any)Unit 
  (x$1: String,x$2: Object*)Unit
 cannot be applied to (String, Int, Int, Int)

#87 brings optional mapping to AnyRef but only for standard scala string interpolation. This PR moves formatting args to be applied before each log call but not only for scala string interpolation