Fixes #1994.

Clarification on how to use insertafter with a regex.

For ansible --list-hosts benefit apply hosts selection limits early

Fixes #1988.

Happens with e.g. "command: true" that YAML helpfully converts to a
bool.

Fixing bug with unicode templates

The utils.md5s() function would break when calculating checksums
for non-ascii characters. Convert to utf-8 first.

Fixes #1983.

Fixes #1980.

This implements a basic --check mode which for now is only implemented on template & copy operations.  More detail will be shared with the list
shortly.

Devel

Integrate upstream changes from Portfile that exists in macports

Fixes #1972.

This makes --list-hosts work more like actually running the playbook,
and thus gets the correct hosts with regard to includes and similar.

Fixes #1959.

Instead of having to remember when to use which one, rename template_ds
to template and move the last bit of code from template to varReplace
(which gets used for all string replacements, in the end).

This means that you can template any data type without worrying about
whether it's a string or not, and the right thing will happen.

See this post - https://groups.google.com/forum/?fromgroups=#!topic/ansible-project/7xdC0MP9MjM

I was not aware that blair had uploaded a portfile to macports already,
this set of changes makes the 'devel' version of the portfile similar
to the upstream. Except the man pages, examples and sample config files.

hg module cleaned up