Added travis CI.
Refresh license file.
Use absolute import URL in example ( doesn't like relative URLs).
Revert "Use absolute import URL in example ( doesn't like relative URLs)."
Because the root of issue isn't relative URL but '.v0' suffix.

This reverts commit 68e86d8d9bcd6d636027cadf74e662fd7f74f737.
Stable branch is v1.
Fix merging conflicts.