Revert "Partial revert of 73c883c due to issues with handlers in roles"

This reverts commit b6056044b741967dd2f688b5618e6276e5bbaee5.
Revert "Keep track of role dependencies across plays"

This reverts commit 73c883c1220d906686f26a0e00a5e00af120fce0.

Conflicts:
	CHANGELOG.md
	lib/ansible/playbook/play.py
Revert "Keep track of role dependencies across plays"

Previous revert was badly merged.

This reverts commit 73c883c1220d906686f26a0e00a5e00af120fce0.

Conflicts:
	CHANGELOG.md
	lib/ansible/playbook/play.py
another bugfix release 1.6.0-acd-20140312-0-custombugfixes