Fix issue caused by making changes to the README.md through IDE which
appears to have incorrectly encoded some of the lines that were not
changed to add the EasyDNS provider details.

This provider class for easydns.com adds support for basic dns records
through the easyDNS v3 API.  Support for dynamic and geo based dns
records is planned for a future update.

Sample configuration for the easyDNS provider are:

  easydns:
     class: octodns.provider.easydns.EasyDNSProvider
     token: <token>
     apikey: <key>

The token and key values are found on the easyDNS customer portal at:

https://cp.easydns.com/manage/security/api/production_info.php

Also, below are some optional configuration parameters which can be
added to override the class defaults.  By default the provider class
connects with the LIVE easyDNS API, if you wish to perform testing
with the easyDNS Sandbox API you can enable it by adding the following
configuration parameter:

     sandbox: True

Note, the API token and key are different for the sandbox than they
are for the production API, you can obtain sandbox credentials at:

https://cp.easydns.com/manage/security/api/sandbox_info.php

Lastly, if you have created Domain Portfolios through the easyDNS CP
you can configure which portfolio new domains will be added to by
supplying the portfolio option with the name of your portfolio.

     portfolio: <portfolio name>

On 2018-06-18, google-cloud package was deprecated and so
it requires us to use google-cloud-dns instead of google-cloud
for GoogleCloudProvider (Google Cloud DNS).

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Adds a new source requested in #239. This source allows a user to pull data from
a legacy system (Bind9, etc.) that does not have an API/existing provider via
AXFR Zone Transfer.

...for testing or emergencies

Add DKIM to provider capabilities

Translates them to/from root CNAME

adding minimal version only for contributors

define 3 kinds of requirements (base, dev, test)
retrieve version from __init__.py
define setuptools minimal version

in CI install full (base, dev, test) dependencies

Supports ALIAS for Dnsimple, Dyn, Ns1, and PowerDNS. Notes added to readme about
some of the quirks found while working with them. TTL seems to mostly be
accepted on ALIAS records so it has been added back, what it means seems to vary
across providers, thus notes.