travis: We want to support down to perl 5.8
(cherry picked from commit 8977020cc2f120d2aae04a4f106f0a59bf99df72)
travis: test perl 5.18
(cherry picked from commit 6ad2fb7721958dda7e1569f0d7efcf0e738d8bf4)
travis: test perl 5.12
(cherry picked from commit 0e6db8053dde43e06aa957191e80d355bb9ac1bb)
travis: build the master branch
(cherry picked from commit 482f9c9714820c3d029d38bc302baa0e09eb2399)
travis: remove notify on successive successful

We try to avoid fails, so higher signal/noise ratio helps
(cherry picked from commit e53063d498c616aff0ce6e06af87671d8c64718b)
travis: change the IRC template

Avoid triggering the munin#9999 hook
(cherry picked from commit a984e35fb7b69d17f17122c4b0f95b46d79cf3c2)
travis: failing fast

We don't need to continue any build when at least 1 test is failing.
As our test matrix is fairly large, being gentle to ressources is nice.
(cherry picked from commit 61171e9d9ce9d3ba494c9f1acf6b89dca3ce85c8)
Merge branch 'travis-stable' into stable-2.0