docs: improve landing page (#57)

Author: dshemetov

docs/index.rst

@@ -5,13 +5,13 @@ epidatpy
 This package provides Python access to the `Delphi Epidata API
 <https://cmu-delphi.github.io/delphi-epidata/>`_ published by the `Delphi
 research group <https://delphi.cmu.edu>`_ at `Carnegie Mellon University
-<https://www.cmu.edu>`_. The package source code and bug tracker can be found
-`on GitHub <https://github.com/cmu-delphi/epidatpy>`_.
+<https://www.cmu.edu>`_.
 
-.. note :: **You should consider subscribing** to the `API mailing list
-   <https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api>`_ to be
-   notified of package updates, new data sources, corrections, and other
-   updates.
+Useful links:
+- source code and bug tracker https://github.com/cmu-delphi/epidatpy
+- listing on PyPI https://pypi.org/project/epidatpy/
+- Epidata API key registration form https://api.delphi.cmu.edu/epidata/admin/registration_form
+- Epidata API key documentation https://cmu-delphi.github.io/delphi-epidata/api/api_keys.html
 
 See also the `CMU Delphi Terms of Use
 <https://delphi.cmu.edu/epidemic-signals/terms-of-use/>`_, noting that the data
@@ -20,13 +20,30 @@ is a research product and not warranted for a particular purpose.
 Installation
 ===============
 
-This package will soon be available on PyPI as `epidatpy
-<https://pypi.org/project/epidatpy/>`_. Meanwhile, it can be installed from
-GitHub:
+Install from PyPI using pip:
 
 .. code-block:: sh
 
-   pip install -e "git+https://github.com/cmu-delphi/epidatpy.git#egg=epidatpy"
+   pip install epidatpy
+
+Documentation Contents
+======================
+
+.. toctree::
+   :maxdepth: 1
+
+   getting_started
+
+   signal_discovery
+
+   versioned_data
+
+   epidatpy
+
+.. note :: **You should consider subscribing** to the `API mailing list
+   <https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api>`_ to be
+   notified of package updates, new data sources, corrections, and other
+   updates.
 
 API Keys
 ===============
@@ -43,17 +60,3 @@ your environment, and adding ``.env`` to your ``.gitignore`` file.
 
 Note that for the time being, the private endpoints (i.e. those prefixed with
 ``pvt``) will require additional permissions (contact us for more information).
-
-Documentation Contents
-======================
-
-.. toctree::
-   :maxdepth: 1
-
-   getting_started
-
-   signal_discovery
-
-   versioned_data
-
-   epidatpy