Add a airbrake hook in a package.
entry: fire hook before obtaining reader #24 #13
entry: log with spaces between all operands on *ln #25
Merge pull request #26 from Sirupsen/printfln-behavior-25

entry: log with spaces between all operands on *ln #25
hook: add tests
Merge pull request #27 from Sirupsen/more-tests

More tests
test: remove temporary benchmarks
hooks/airbrake: fix docs
entry: remove duplicate hook for debug level
text_formatter: move relative time logic from entry
Merge branch 'master' of https://github.com/Sirupsen/logrus