added Nondeterminism typeclass
Future now implements Nondeterminism
Merge pull request #298 from folone/scalaz-seven

re #295 NEL → Nel
added sequenceU and traverseU to Traverse trait, rather than only having them as syntax, used infix
Slight tweak to Nondeterminism to deal with empty sequence in chooseAny, added more tests for Task and made bugfixes
merged
alternative implementation of actor code and tests for it
Merge pull request #299 from plokhotnyuk/scalaz-seven

Build passed. Merging.
Task implements Catchable now
added scaladoc to Future and Task and minor cleanup