XLogger improvement (http://bugzilla.slf4j.org/show_bug.cgi?id=197)
minor edits
link to short video
Bugzilla #269.
docs updates
remove link to ohloh counter
fix bug 270
adding vargs support to Logger interface
avoid version mismatch warning (when run with slf4j-api-1.6.jar) by setting REQUESTED_VERSION to 1.6.99 instead of 1.7
preparing release 1.7.0
starting work on 1.7.1
fix typo
rewording
minor corrections
refactoring to improve readability
have all tests pass
added log file support
added levelInBrackets option
delay initialization until first logger is invoked
doc updates, rename defaultLog property as defaultLogLevel