Updated tox to include py38. Updating setup.py to use most recent des…

…cription from readme.md. Better installation instructions.

docs/index.rst

@@ -6,7 +6,17 @@ A Pythonic interface to the Gmail API that actually works as of November 2019.
 Installation
 ------------
 
-``pip install ezgmail``
+EZGmail can be installed from PyPI using `pip`:
+
+    ``pip install ezgmail``
+
+On macOS and Linux, installing EZGmail for Python 3 is done with `pip3`:
+
+    ``pip3 install ezgmail``
+
+If you run into permissions errors, try installing with the `--user` option:
+
+    ``pip install --user ezgmail``
 
 You must also sign up for a Gmail account at https://gmail.com/. Then, go to
 https://developers.google.com/gmail/api/quickstart/python/, click the **Enable the Gmail API** button on that page,
@@ -105,7 +115,7 @@ operatives for it too:
 
 More search operatives are described at https://support.google.com/mail/answer/7190?hl=en
 
-The API contains complete documentation.
+The API section contains complete documentation.
 
 API
 ---

setup.py

@@ -8,15 +8,17 @@
 
 # Read in the README.md for the long description.
 with open('README.md') as fo:
-    long_description = fo.read()
+    content = fo.read()
+    long_description = content
+    description = re.search('(A Pythonic interface to.*)', content).group(1)
 
 setup(
     name='EZGmail',
     version=version,
     url='https://github.com/asweigart/ezgmail',
     author='Al Sweigart',
     author_email='al@inventwithpython.com',
-    description=('''A Pythonic interface to the Gmail API that actually works as of June 2019.'''),
+    description=description,
     long_description=long_description,
     long_description_content_type="text/markdown",
     license='GPLv3+',
@@ -32,6 +34,7 @@
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7'
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
     ],
 )

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py34, py35, py36, py37
+envlist = py34, py35, py36, py37, py38
 
 [testenv]
 deps =