Allow prevention of log file reuse. This is nice if you want to create a new log file at every app launch.
Modification keeps backwards compatibility with existing code as it will maintain previous behavior if the reuseExistingLogFile property isn’t set.
Invert logic as suggested by rivera-ernesto
Removing useExistingLogFile as it is now redundant
Merge pull request #238 from Diarrhio/master

Allow prevention of log file reuse.