shrink Travis usage
shrink Travis usage

There is no point running builds, tests, lints on Travis, since we
already do that on Circle.

The only thing we aren't doing (and can't do) on Circle is doc
publishing, so now Travis does just that.

(cherry picked from commit 1038cbd1a3629fb2c9a2571d59b066800b2d2e20)

weaveworks/weave,paulbellamy/weave,dpw/weave,n054/weave,weaveworks/weave,weaveworks/weave,paulbellamy/weave,n054/weave,paulbellamy/weave,dpw/weave,dpw/weave,weaveworks/weave,dpw/weave,n054/weave,dpw/weave,n054/weave,n054/weave,paulbellamy/weave