Update core description.

Conflicts:
	libs/libraries.htm

libs/libraries.htm

@@ -123,7 +123,7 @@ how to download, build, and install the libraries.</p>
     <li><a href="container/index.html">container</a> - Standard library containers and extensions, from Ion Gazta&ntilde;aga</li>
     <li><a href="context/index.html">context</a> - Context switching library, from Oliver Kowalke</li>
     <li><a href="conversion/index.html">conversion</a> - Polymorphic and lexical casts, from Dave Abrahams and Kevlin Henney.</li>
-    <li><a href="core/index.html">core</a> - A collection of core utilities, maintained by Peter Dimov, Glen Fernandes, and Andrey Semashev.</li>
+    <li><a href="core/index.html">core</a> - A collection of simple core utilities with minimal dependencies, maintained by Peter Dimov, Glen Fernandes, and Andrey Semashev.</li>
     <li><a href="coroutine/index.html">coroutine</a> - Coroutine library, from Oliver Kowalke</li>
     <li><a href="crc/index.html">crc</a> - Cyclic Redundancy Code, from Daryle
       Walker.</li>
@@ -884,7 +884,7 @@ of arbitrary data for persistence and marshalling, from Robert Ramey</li>
 <ul>
     <li><a href="conversion/index.html">conversion</a> - Polymorphic and lexical casts, from Dave Abrahams and
         Kevlin Henney.</li>
-    <li><a href="core/index.html">core</a> - A collection of core utilities, maintained by Peter Dimov, Glen Fernandes, and Andrey Semashev.</li>
+    <li><a href="core/index.html">core</a> - A collection of simple core utilities with minimal dependencies, maintained by Peter Dimov, Glen Fernandes, and Andrey Semashev.</li>
     <li><a href="numeric/conversion/doc/html/index.html">numeric/conversion</a> - Optimized Policy-based Numeric Conversions,
         from Fernando Cacciola.</li>