CHANGELIST

* 0.11.3
  - Add optimized match_direct method

* 0.10.7
  - add Grok::PatternError exception class
  - raise PatternError when a pattern contains an unknown %{expansion}

* 0.10.1
  - No code changes.
  - Bump rubygem 'cabin' version dep

* 0.10.0
  - Add Grok#discover support

* 0.9.4
  - Fix a bug causing all backslashes in patterns to be doubled due to a
    strange behavior in Ruby's String#sub. This is now worked around.