New stable branch v1.
Added travis CI.
Fix link to travis-ci.org icon URL.
Fix merging conflicts.
Revert "Revert "Use absolute import URL in example ( doesn't like relative URLs).""
`go get ./...` is full of surprises.

This reverts commit 323289ab27d509f732d2e9055d229de21a4d5d1c.
Change import URL in example to stable suffix v1.