Convert readthedocs link for their .org -> .io migration for hosted p…

…rojects

As per [their blog post of the 27th April](https://blog.readthedocs.com/securing-subdomains/) ‘Securing subdomains’:

> Starting today, Read the Docs will start hosting projects from subdomains on the domain readthedocs.io, instead of on readthedocs.org. This change addresses some security concerns around site cookies while hosting user generated data on the same domain as our dashboard.

Test Plan: Manually visited all the links I’ve modified.

CHANGELOG.rst

@@ -135,7 +135,7 @@
 ---
 * `Paramiko <http://pypi.python.org/pypi/paramiko/1.8.0>`_ integration 
   (`#10 <https://github.com/tomerfiliba/plumbum/issues/10>`_)
-* CLI: now with built-in support for `sub-commands <http://plumbum.readthedocs.org/en/latest/cli.html#sub-commands>`_.
+* CLI: now with built-in support for `sub-commands <https://plumbum.readthedocs.io/en/latest/cli.html#sub-commands>`_.
   See also: `#43 <https://github.com/tomerfiliba/plumbum/issues/43>`_
 * The "import hack" has moved to the package's ``__init__.py``, to make it importable directly
   (`#45 <https://github.com/tomerfiliba/plumbum/issues/45>`_)

README.rst

@@ -14,7 +14,7 @@
    :target: https://ci.appveyor.com/project/HenrySchreiner/plumbum/branch/master
    :alt: Windows Build Status
 .. image:: https://readthedocs.org/projects/plumbum/badge/
-   :target: http://plumbum.readthedocs.org/en/latest/
+   :target: https://plumbum.readthedocs.io/en/latest/
    :alt: Documentation Status
 
 
@@ -34,7 +34,7 @@ manipulation, and a programmatic Command-Line Interface (CLI) application toolki
 Now let's see some code!
 
 *This is only a teaser; the full documentation can be found at*
-`Read the Docs <http://plumbum.readthedocs.org>`_
+`Read the Docs <https://plumbum.readthedocs.io>`_
 
 Cheat Sheet
 -----------

conda.recipe/meta.yaml

@@ -37,7 +37,7 @@ test:
     - paramiko
 
 about:
-  home: http://plumbum.readthedocs.org
+  home: https://plumbum.readthedocs.io
   license: MIT License
   summary: 'Plumbum: shell combinators library'
 

plumbum/__init__.py

@@ -32,7 +32,7 @@
 SCP-based upload/download, and a {arg|opt}parse replacement for the easy creation
 of command-line interface (CLI) programs.
 
-See http://plumbum.readthedocs.org for full details
+See https://plumbum.readthedocs.io for full details
 """
 from plumbum.commands import ProcessExecutionError, CommandNotFound, ProcessTimedOut
 from plumbum.commands import FG, BG, TEE, TF, RETCODE, ERROUT, NOHUP

setup.py

@@ -48,7 +48,7 @@ def run(self):
     author = "Tomer Filiba",
     author_email = "tomerfiliba@gmail.com",
     license = "MIT",
-    url = "http://plumbum.readthedocs.org",
+    url = "https://plumbum.readthedocs.io",
     packages = ["plumbum", "plumbum.cli", "plumbum.commands", "plumbum.machines", "plumbum.path", "plumbum.fs", "plumbum.colorlib"],
     platforms = ["POSIX", "Windows"],
     provides = ["plumbum"],