* start rst docs for ansible-vault encrypt_string
* wip, vault format docs
(sorta markdown ish atm)
* wip - formatting
* wip, vault docs
* Fix refs to other docs for now
fixing default_role in conf.py will remove need
for this
* add 'ref' to cli names
* more vault docs
* wip, misc fixes
* add some encrypt_string examples
* Fix up rstcheck warnings
The code blocks in question included the output that would
be echo'ed from running the command, which isnt valid bash.
* fix formatting and rstcheck warnings about code-block
* Add envvar ref for ANSIBLE_VAULT_PASSWORD_FILE
* fix doc title
* Fixed title underline
