Add type diagrams.

date.html

@@ -26,7 +26,7 @@
 <br/>
 <br/>
 <a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/>
-2016-05-28<br/>
+2016-06-27<br/>
 </address>
 <hr/>
 <h1 align=center><code>date</code></h1>
@@ -34,6 +34,7 @@
 <h2>Contents</h2>
 
 <ul>
+<li><a href="https://github.com/HowardHinnant/date">github link</a></li>
 <li><a href="#Introduction">Introduction</a></li>
 <li><a href="#Implementation">Implementation</a></li>
 <li><a href="#Overview">Overview</a></li>
@@ -70,6 +71,17 @@ done at compile-time to run-time.  Porting to C++98/03 has not been attempted.
 
 <a name="Overview"></a><h2>Overview</h2>
 
+<p>
+Here is an overview of all the types we are going to talk about at some point.  They are
+all fully covered in the reference section.  This link is just there to give you a view
+of everything on one quick page so that you don't get lost or overwhelmed.  Many of these
+types will never need to be explicitly named in typical use cases.
+</p>
+
+<blockquote>
+<a href="date_types.jpeg">date_types.jpeg</a>
+</blockquote>
+
 <p>
 This library builds date and date/time support on top of the <code>&lt;chrono&gt;</code>
 library.  However it does not support timezones nor leap seconds.  A

tz.html

@@ -26,7 +26,7 @@
 <br/>
 <br/>
 <a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/>
-2016-06-16<br/>
+2016-06-27<br/>
 </address>
 <hr/>
 <h1 align=center>Time Zone Database Parser</h1>
@@ -134,6 +134,18 @@ the learning curve for this library is greatly eased.
 
 <a name="Description"></a><h2>Description</h2>
 
+
+<p>
+Here is an overview of all the types we are going to talk about at some point.  They are
+all fully covered in the reference section.  This link is just there to give you a view
+of everything on one quick page so that you don't get lost or overwhelmed.  Many of these
+types will never need to be explicitly named in typical use cases.
+</p>
+
+<blockquote>
+<a href="tz_types.jpeg">tz_types.jpeg</a>
+</blockquote>
+
 <p>
 Everything documented below is in <code>namespace date</code>.  Explicit references to
 this namespace in example code below is intentionally omitted in the hopes of reducing