added prev/next links to docs

doc/00-intro.md

@@ -59,3 +59,5 @@ autoloading:
     require 'vendor/.composer/autoload.php';
 
 That's all it takes to have a basic setup.
+
+[Basic Usage](01-basic-usage.md) →

doc/01-basic-usage.md

@@ -177,3 +177,5 @@ This can be useful for autoloading classes in a test suite, for example.
 > **Note:** Composer provides its own autoloader. If you don't want to use
 that one, you can just include `vendor/.composer/autoload_namespaces.php`,
 which returns an associative array mapping namespaces to directories.
+
+← [Intro](00-intro.md)  |  [Libraries](02-libraries.md) →

doc/02-libraries.md

@@ -158,3 +158,5 @@ publish it on packagist as well. And this is really easy.
 You simply hit the big "Submit Package" button and sign up. Then you submit
 the URL to your VCS repository, at which point packagist will start crawling
 it. Once it is done, your package will be available to anyone.
+
+← [Basic usage](01-basic-usage.md) |  [Command-line interface](03-cli.md) →

doc/03-cli.md

@@ -184,3 +184,5 @@ commands) to finish executing. The default value is 60 seconds.
 If you are using composer from behind an HTTP proxy, you can use the standard
 `HTTP_PROXY` or `http_proxy` env vars. Simply set it to the URL of your proxy.
 Many operating systems already set this variable for you.
+
+← [Libraries](02-libraries.md)  |  [Schema](04-schema.md) →

doc/04-schema.md

@@ -388,3 +388,5 @@ dir` (from config).
 See (Vendor Bins)[articles/vendor-bins] for more details.
 
 Optional.
+
+← [Command-line interface](03-cli.md)  |  [Repositories](05-repositories.md) →

doc/05-repositories.md

@@ -262,3 +262,6 @@ You can disable the default packagist repository by adding this to your
             }
         ]
     }
+
+
+← [Schema](04-schema.md)  |  [Community](06-community.md) →

doc/06-community.md

@@ -26,3 +26,5 @@ The developer mailing list is on [google groups](http://groups.google.com/group/
 IRC channels are available for discussion as well, on
 irc.freenode.org [#composer](irc://irc.freenode.org/composer) for users and
 [#composer-dev](irc://irc.freenode.org/composer-dev) for development.
+
+← [Repositories](05-repositories.md)