Make asSequential of Seq final .
Move test-helper method to utility.
Implement positional and non-positional takeWhile that support parallel execution.
Implement positional filter that support parallel execution.
Implement count operators that support parallel execution.
Remove isFinite operator that is confusing.
Make source JDK 1.6 compatible.
Implements fold/fold-with-seed operator that supports parallel execution.
Add test.
Rename tests.
Implements max/maxBy operator that supports parallel execution.
Implements min/minBy operator that supports parallel execution.
Implements minmax/minmaxBy operator that supports parallel execution.