Addresses #6591 Hide diff for lineinfile if file did not change.

Allow npm to install to a directory that doesn't yet exist

etcd lookup: use $ANSIBLE_ETCD_URL if it exists in the env

If path is specified but does not exist, create it.
Fail if path is specified but is not a directory

This allows usage of custom ssh configs for remote hosts where
the inventory user does not match the configured user.

assign_public_ip was actually added in 1.5

Checked 1.4.5 and this option doesn't exist. Will check/update/pull docs next.

Conflicts:
	lib/ansible/inventory/__init__.py

Fix logic in process_common_errors for unbalanced quotes

docker: add tty and stdin_open options

Add cloud modules ec2_scaling_policy and ec2_metricalarm

irc module: Make default irc color none; add color none

Fixes #4875