Moved the Rope into a separate file, flattened structure
Added more tests
This fixes #275
Merge pull request #300 from folone/scalaz-seven

Rope init/tail fix
get rid of Phaser to allow testing with Java 6
Merge pull request #301 from plokhotnyuk/scalaz-seven

get rid of Phaser to allow testing with Java 6
Travis CI: build against Java 6 and 7