Update codespell repository

Codespell got a new home with its own github organization. Reflect that
in the repository.

README.rst

diff --git a/README.rst b/README.rst
index 4f8d0b4..2dd1d72 100644
--- a/README.rst
+++ b/README.rst
@@ -7,14 +7,14 @@
 Useful links
 ------------
 
-* `GitHub project <https://github.com/lucasdemarchi/codespell>`_
+* `GitHub project <https://github.com/codespell-project/codespell>`_
 
 * Mailing list: <codespell@googlegroups.com> with web archives/interface
   `here <https://groups.google.com/forum/?fromgroups#!forum/codespell>`_
 
-* `Repository <https://github.com/lucasdemarchi/codespell>`_
+* `Repository <https://github.com/codespell-project/codespell>`_
 
-* `Releases <https://github.com/lucasdemarchi/codespell/releases>`_
+* `Releases <https://github.com/codespell-project/codespell/releases>`_
 
 Requirements
 ------------
@@ -130,13 +130,13 @@
 
 To stay current with codespell developments it is possible to build codespell from GitHub via::
 
-    pip install --upgrade git+https://github.com/lucasdemarchi/codespell.github
+    pip install --upgrade git+https://github.com/codespell-project/codespell.github
 
 **Important Notes:**
 
 * Sometimes installing via ``pip`` will complain about permissions. If this is the case then run with ::
 
-    pip install --user --upgrade git+https://github.com/lucasdemarchi/codespell.git
+    pip install --user --upgrade git+https://github.com/codespell-project/codespell.git
 
 * It has been reported that after installing from ``pip``, codespell can't be located. Please check the $PATH variable to see if ``~/.local/bin`` is present. If it isn't then add it to your path. 
 * If you decide to install via ``pip`` then be sure to remove any previously installed versions of codespell (via you OSs preferred app mananger). 

codespell.1.include

diff --git a/codespell.1.include b/codespell.1.include
index fc9e562..4496934 100644
--- a/codespell.1.include
+++ b/codespell.1.include
@@ -14,4 +14,4 @@
 Lucas De Marchi <lucas.de.marchi@gmail.com>
 
 [SEE ALSO]
-https://github.com/lucasdemarchi/codespell
+https://github.com/codespell-project/codespell

setup.py

diff --git a/setup.py b/setup.py
index 310cbb6..f9352ba 100755
--- a/setup.py
+++ b/setup.py
@@ -13,9 +13,9 @@
 DESCRIPTION = """Codespell"""
 MAINTAINER = 'Lucas De Marchi'
 MAINTAINER_EMAIL = 'lucas.de.marchi@gmail.com'
-URL = 'https://github.com/lucasdemarchi/codespell/'
+URL = 'https://github.com/codespell-project/codespell/'
 LICENSE = 'GPL v2'
-DOWNLOAD_URL = 'https://github.com/lucasdemarchi/codespell/'
+DOWNLOAD_URL = 'https://github.com/codespell-project/codespell/'
 with open('README.rst', 'r') as f:
     LONG_DESCRIPTION = f.read()