Making the location information optional. Added a member variable, constructor, getter and setter for whether location information should be included in the log message. If not, the location information is not generated at all which saves quite some time.
Added a test properties file with the location information setting to show how that works.
Added unit tests to make sure that the location information was not included if set to false.
Added a method (not a test method) to measure the performance difference of including location information or not.
Annotated the performance measurement method with @Test and @Ignore to be able to run it from JUnit but to exclude it by default. This generates a warning so this can be improved. I just don't have time right now :-).
Merge pull request #5 from StFS/master

Making location info optional improves performance.