Fix issue 4433, make sure status is a int rather than a string

Fixes a dev branch glitch where a conditional could be applied to multiple tasks.  Also improves the errors on parsing bad conditionals to make them less confusing to users.

Using ANSIBLE_ROLE_PATH environment variable or role_path in ansible.cfg
can configure paths where roles will be searched for
extra paths will only be used as a backup once regular locations are exhausted

add a way for callback to disable itself

Fix bug for setting ec2 tags

Fix an issue where the ordering of an include statement is processed ahead of the conditional in the included statement,
which required a redundant check to see if a variable was defined rather than short circuiting.

Fixes #4469

Fixed broken force=yes on files for directories

in ansible.cfg.

Have the parser explain another type of YAML gotcha to reduce the need for users to ask how to resolve it.

A small refactoring of the authorized_key module to accomodate these
changes, plus fixing some things like not rewriting the file on every
new key. These changes bring the original feature for ssh options in-
line with the comments in #3798

Fixes #3785

Corrected docs

Corrected docs ("monitor" -> "monitoring" and dissociated monitoring from instance_tags in examples)

Template sudo_user via with_items

Fixes #4458

Fixed crash when s3 bucket did not exist for put operation

This oneliner change allows apt-key to inherit the http_proxy variable.