Minor formatting adjustments

make log formatting same as non-leveled logger (#5)

* make log formatting same as non-leveled logger

* also remove prefixes

* put back prefixes for unleveled logger

Remove ctx from Logger

v1.1.0

only pass context to LeveledLogger (#3)

Contexted log

Merge pull request #2 from vimeo/ctx_logger

make logger contexted so we can feed alog in