Added support for key prefix configuration.
Update README.md
Update README.md

Readme fix
Some boring stuff.
Removed the branching in stream_formatter.
Using prefixes by default is enabled again.
Fixed default prefix names.
Small fixes.
Update README.md
Fixed possible memory leak on config reload (can we do it? >_>)
No more callocs. Also fixed some whitespace.
More formatting fixes
Assert for asprintf.
Fixed README misprint
Fixed comparison of double variables and float constants.
Another assertation.
Test for prefixes.
Bugfix
Merge pull request #49 from melkor217/master

Configurable prefixes for message types