Simple replacements of SequenceBuilder with ArrayList
Conflicts:
	source/ceylon/build/tasks/ceylon/model.ceylon
Iterable.skipping() has been renamed to skip()
ValueDeclaration has been changed
Changed declaration of Package.annotatedMembers() as described here:
https://github.com/ceylon/ceylon.language/issues/389
changed SequenceBuilder to ArrayList in phasesDependencies()
changed SequenceBuilder to ArrayList in
GoalDefinitionsBuilder.definitionsMap()
Modified path test so it runs on Windows
use Iterable.sequence() as  Iterable.sequence doesn't exist anymore