Merge Task into Node and simplify its interface
Remove leftover reference to Task class
Merge pull request #23 from clue/tasknode

Merge Task into Node and simplify its interface
Return absolute (fully-qualified) name for nodes
Add type hints
Add helper to get all sub-tasks
Unify getting (resolving) single tasks
Return all task nodes (including groups)
Fix invalid assignment introduced while rebasing
Add tests for Node / resolving task names
Merge pull request #22 from clue/tasks

Consistent task names and resolving
Merge branch 'master' into all-tasks

Conflicts:
	lib/phake/Builder.php
	lib/phake/Node.php
	lib/phake/Task.php