doc: call console module 'console' not 'stdio'

The console module has always been called 'stdio' in the
table-of-contents, but nowhere else, since its name is
'console'. This makes it difficult to find.

This is a back-port of commit 226a20d from the master branch.

doc/api/_toc.markdown

@@ -5,6 +5,7 @@
 * [C/C++ Addons](addons.html)
 * [Child Processes](child_process.html)
 * [Cluster](cluster.html)
+* [Console](console.html)
 * [Crypto](crypto.html)
 * [Debugger](debugger.html)
 * [DNS](dns.html)
@@ -23,7 +24,6 @@
 * [Query Strings](querystring.html)
 * [Readline](readline.html)
 * [REPL](repl.html)
-* [STDIO](stdio.html)
 * [Stream](stream.html)
 * [String Decoder](string_decoder.html)
 * [Timers](timers.html)

doc/api/all.markdown

@@ -1,7 +1,7 @@
 @include documentation
 @include synopsis
 @include globals
-@include stdio
+@include console
 @include timers
 @include modules
 @include addons

doc/api/globals.markdown

@@ -30,7 +30,7 @@ The process object. See the [process object][] section.
 
 * {Object}
 
-Used to print to stdout and stderr. See the [stdio][] section.
+Used to print to stdout and stderr. See the [console][] section.
 
 ## Class: Buffer
 
@@ -185,5 +185,5 @@ The timer functions are global variables. See the [timers][] section.
 [module system documentation]: modules.html
 [Modules]: modules.html#modules_modules
 [process object]: process.html#process_process
-[stdio]: stdio.html
+[console]: console.html
 [timers]: timers.html