Adding SX and UM to NA countries

v0.9.13 version bump and CHANGELOG update

Fix git URL in readme

Fix missing dot in README example zone definition

Full support for A/AAAA dynamic records in Azure

skip monitors that are not managed by OctoDNS

Azure DNS dynamic record bug fixes

Also add _extra_changes to dynamic record tests to make them more
exhausitve.
Simplify root profile's endpoint names.

fix for NA continent geo target limitation on NS1

Minor Python 2.7 fixes

Azure DNS dynamic record bug fixes

The test_login test from TestUltraProvider would fail in Python 2.7
due to the dictionary insertion order not being preserved in 2.7
and early 3.x versions. Comparing the dictionaries containing the
query parameters solves this. Snippet from test failure:

- username=user&password=rightpass&grant_type=password
+ grant_type=password&username=user&password=rightpass

Due to an import error the envvar source tests would not run
in Python 2.7

In Python 2.7 the if statement would catch both cases from the test
test_populate_lenient_fallback, so the test was failing. These are
the error strings differences between Python 2 and 3:

Python 2:
NoLenient: populate() got an unexpected keyword argument 'lenient'
NoZone: populate() got multiple values for keyword argument 'lenient'

Python 3:
NoLenient: populate() got an unexpected keyword argument 'lenient'
NoZone: populate() got multiple values for argument 'lenient'

processors - hook in to modify zones to hide stuff from octoDNS, modify things, add special records, ...

Partial support for dynamic A+AAAA records on Azure