Merge pull request rabbitmq#491 from rabbitmq/rabbitmq-server-94

Switch to Lager for logging

packaging: Always use xzcat(1) to decompress xz archive

Do not rely on tar's behaviour. It was already done everywhere except in
those three places.

Commit Debian and RPM release notes

Add Travis CI configuration

Merge branch 'stable'

Back port rabbitmq/rabbitmq-common#34

This comment is no longer relevant

make *-in-rabbitmq_test: Depend on test-build and TEST_DEPS list

Merge pull request rabbitmq#450 from rabbitmq/rabbitmq-server-447

Switch absolute memory watermark values to be in bytes

packaging: Quote variables passed to sub-makes