Merge pull request #46 from jasondew/lograge_logger

Adding ability to specify a logger for Lograge to use
Fix logstash-event version.
Bump version.
Unprivate logger accessor.

Breaks when ActiveSupport flushes log subscribers, as pointed out in
https://github.com/roidrage/lograge/commit/fef38c2015ba338f7505e3e6eca169161fcf174a#commitcomment-4091932
Bump version.
Break the key-value format algorithm into a couple of methods

refs roidrage/lograge#47
Refactor the key-value formatter spec to use shared examples, refs roidrage/lograge#47
Measure ALL THE FLOATS. refs roidrage/lograge#47

Theory is that in most cases floats indicate timings
Use l2met conventions over lograge conventions for controller/action

Compacts controller=x action=y into source=x#y

Refs #47
Use ':' to separate controller from action in `source`

The librato API only allows certain characters to be used in the source,
refs #47
Change forward slashes in l2met sources to dashes, refs #47
Merge pull request #47 from memberful/l2met-formatter

Support l2met formatter
Add example on how to add a timestamp
update logstash formatter for 1.2, which moves fields to the global namespace
Merge pull request #55 from apptentive-engineering/fix_fields_for_1_2

logstash formatter updates for 1.2
Add json formatter.
Merge pull request #56 from i0rek/json_formatter

Add json formatter.
Add before_format hook.
Add Ruby 2.1.0 to .travis.yml
Merge pull request #60 from salimane/pr_ruby_2_1_0

Add Ruby 2.1.0 to .travis.yml