Credit howtos/tuts authors (#264)

how-tos/casting-type-to-custom-json.rst

@@ -1,6 +1,8 @@
 Casting a type to a custom JSON object
 ======================================
 
+:author: `steve-chavez <https://github.com/steve-chavez>`_
+
 While using PostgREST you might have noticed that certain PostgreSQL types translate to JSON strings when you would
 have expected a JSON object or array. For example, let's see the case of `range types <https://www.postgresql.org/docs/11/rangetypes.html>`_.
 

how-tos/embedding-table-from-another-schema.rst

@@ -1,6 +1,8 @@
 Embedding a table from another schema
 =====================================
 
+:author: `steve-chavez <https://github.com/steve-chavez>`_
+
 Suppose you have a **people** table in the ``public`` schema and this schema is exposed through PostgREST's :ref:`db-schema`.
 
 .. code-block:: postgres

tutorials/tut0.rst

@@ -3,6 +3,8 @@
 Tutorial 0 - Get it Running
 ===========================
 
+:author: `begriffs <https://github.com/begriffs>`_
+
 Welcome to PostgREST! In this pre-tutorial we're going to get things running so you can create your first simple API.
 
 PostgREST is a standalone web server which turns a PostgreSQL database into a RESTful API. It serves an API that is customized based on the structure of the underlying database.

tutorials/tut1.rst

@@ -3,6 +3,8 @@
 Tutorial 1 - The Golden Key
 ===========================
 
+:author: `begriffs <https://github.com/begriffs>`_
+
 In :ref:`tut0` we created a read-only API with a single endpoint to list todos. There are many directions we can go to make this API more interesting, but one good place to start would be allowing some users to change data in addition to reading it.
 
 Step 1. Add a Trusted User