add a basic test framework before making changes
when Rails, ensure local log is relative to Rails.root
Add support for explicit local log device

* simplify tests a bit
add a 'rake console' task for convenience
tweak the local logging notes in the readme

* along the the way grammar lost it was..
#18 clear the log queue and terminate async worker cleanly on process shutdown
#22 Allow setting of explicit local log device even in Rails environments

* refines #22
* previous version only allowed the local log file name to be set in non-rails context
 bumping up version number
Merge branch 'evendis-async_flush'