doc: alphabetize all.markdown

Previously `toc.markdown` was alphabetized but `all.markdown` was not.

PR-URL: #566
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>

doc/api/all.markdown

@@ -1,38 +1,38 @@
 @include documentation
 @include synopsis
-@include globals
-@include console
-@include timers
-@include modules
 @include addons
-@include process
-@include util
-@include events
-@include domain
+@include assert
 @include buffer
-@include stream
+@include child_process
+@include cluster
+@include console
 @include crypto
-@include tls
-@include string_decoder
-@include fs
-@include path
-@include net
+@include debugger
 @include dgram
 @include dns
+@include domain
+@include events
+@include fs
+@include globals
 @include http
 @include https
-@include url
-@include querystring
+@include modules
+@include net
+@include os
+@include path
+@include process
 @include punycode
+@include querystring
 @include readline
 @include repl
-@include vm
-@include child_process
-@include assert
-@include tty
-@include zlib
-@include os
-@include debugger
-@include cluster
 @include smalloc
+@include stream
+@include string_decoder
+@include timers
+@include tls
+@include tty
+@include url
+@include util
 @include v8
+@include vm
+@include zlib