Preparing repository for splitting cookbooks into their own repos.

* Add a CONTRIBUTING file to each cookbook.
* Move the Changes/Roadmap section(s) to CHANGELOG.md.
* Create the Apache LICENSE file in each cookbook.
users v1.1.0
fix template not found issue when calling users_manage LWRP

from outside of the users cookbook
add configurable cookbook attribute for users_manage LWRP

used to determine which cookbook the authorized_keys template is located in
users v1.1.2
[COOK-1087] Update the CONTRIBUTING file to fix a minor typo
clarify location of users data bag and markdown cleanup
fixed create user search query to prevent removed users from being recreated
FC001: Use strings in preference to symbols.
FC003: Check before using server-specific features
FC016: LWRP does not declare a default action.
FC017: LWRP does not notify when updated.
FC002: Avoid unnecessary string interpolation.
regression, change from 1ea6202 was lost in FC003 update
Reworked manage provider to use 'username' instead of 'id' for the user's name

The original code ignores the use of the 'username' attribute.

This fix allows the use of 'username' which also bypasses some user name
limitations inherent to data bags.

For example, I wanted to have a user name with a period in it but the
data bag 'id' is limited to alphanumeric, -, _ characters.
[COOK-1583] Ability to set a password

When a 'password' entry exists in the users data bag, chef will set the user's
password.

Depenes on an Omnibus ruby, since it will ship with ruby-shadow. Not attempting
to make this backward compatible with non-omnibus rubies.

The password would not be saved to the data bag in clear text. It would be
hashed, which the user resource already accepts.  Hashing can be achieved with:
    `openssl passwd -1 "plaintextpassword"`
release v1.1.4
[COOK-1582] Change ssh_keys to an array

Currently the users cookbook allows a string or an array for the ssh_keys value.
Updated documentation to reflect the recommended usage as an Array.
Adding whyrun support to users/manage.rb
Ignore vim swap files