LOGBACK-909 Fix race condition in SMTPAppenderBase caused by shared MimeMessage instance.
fixed broken test setup for addsInfoMessageWhenEventIsBeingDroppedBecauseOfConnectionProblemAndDequeCapacityLimitReached
removed unnecessary spawn of a connector thread
promoted socket connector to become a member to reduce overhead when creating socket connection
simplified socket re-connection logic
added missing unit test for re-establishing the socket connection when stream creation fails with IOException
added additional unit tests for stopping socket appender task on interrupts
removed unnecessary TODO comment
Update javadoc, cannot find CustomDBNameResolver
fix LOGBACK-116

Correct RollingCalendarTest. Modify time-zone offset handling.
add Sebastian Groebler to list of CLAs
add tavis config file
Ensure that logback-classic builds with Travis
add CLA for A. Dorokhine
AppenderBase started variable made volatile as it is mutable, access to it is not synchronized and it is shared between threads.
Fix for http://jira.qos.ch/browse/LOGBACK-1037
Merge pull request #229 from Mahoney/fix-non-threadsafe-appender

AppenderBase started variable made volatile
suppres --> suppress
Merge pull request #231 from rtack/patch-1

Fixed typo in configuration.html
Update CONTRIBUTING.md
Update CONTRIBUTING.md