LOGBACK-269 Added code enabling using AsyncAppenders appender-ref in groovy.
LOGBACK-269 2-space tabs for new files and fileheader.
Ensure that exception is thrown if configuration file has unexpected extension (not .xml or .groovy)
added Marvin Lillehaug to CLAs list
Merge pull request #132 from kantega/master

Add support for appenderRef in Groovy configuration
Update release notes for 1.1.0

Add note for pull request #132 (LOGBACK-269)
Merge pull request #38 from halvards-master

Throw exception for unexpected file extension for config
Update release notes for 1.1.0

Add note for pull request #38 -- throw exception for unknown config
file extensions.