Added new server/cmdline/io programmers' guide.

src/site/docs/serverguide.markdown

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+---
+layout: article
+title: "Command-Line Apps"
+description: "Documentation, references, and more about server-side programming."
+has-permalinks: true
+---
+
+{% include docs_toc.html %}
+
+# {{ page.title }}
+
+You can use Dart for any kind of command-line app from scripts to servers.
+
+## Show me the code
+
+If you prefer to plow through code, start with the following examples.
+These samples progress from simple to complex
+and illustrate a variety of APIs specific to command-line apps and servers.
+
+<hr>
+
+<div class="row">
+<div class="col-md-5">
+
+### Best place to start
+
+* [Dart by Example](/dart-by-example/#dart-io-and-command-line-apps)
+
+</div>
+<div class="col-md-7">
+
+#### Top 10
+
+10. Using files, directories, and symlinks
+9. Reading and writing files
+8. Listing contents of directories
+7. Using streams
+6. Making HTTP requests
+5. Getting the response
+4. Handling errors
+3. Serving index.html
+2. Adding custom headers
+1. Implementing an HTTP server
+0. ...and more...
+
+</div>
+</div>
+
+<hr>
+
+<div class="row">
+<div class="col-md-5">
+
+### Basic command-line apps
+
+* [dcat](https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/samples/dcat/README.md)
+* [dgrep](https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/samples/dgrep/README.md)
+</div>
+<div class="col-md-7">
+
+#### APIs
+
+* Parsing command-line arguments
+* Reading a file
+* Converting data
+* Using stdin, stdout, and stderr
+* Listing a directory recursively
+* Testing and getting information about paths
+</div>
+</div>
+
+<hr>
+
+<div class="row">
+<div class="col-md-5">
+
+#### Servers
+
+* [slambookserver](https://github.com/dart-lang/dart-tutorials-samples/blob/master/web/slambook/)
+* [dartiverse_search](https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/samples/dartiverse_search/readme.txt)
+
+</div>
+<div class="col-md-7">
+
+#### APIs
+
+* Using the HttpServer class
+* Handling GET, POST, and OPTIONS requests
+* Using CORS headers
+* Using WebSockets
+* Getting responses
+* Routing requests
+* Handling errors
+
+</div>
+</div>
+
+<hr>
+
+## Read all about it
+
+Follow these links in order to gain a full understanding
+of how to write different kinds of command-line apps in Dart using
+various Dart libraries and packages.
+
+### Prerequisites (dart:async library)
+
+* [Use Future-Based APIs](/docs/tutorials/futures/)
+<img src="/docs/tutorials/images/target.png" height="16" width="16">
+* [Use Streams for Data](/docs/tutorials/streams/)
+<img src="/docs/tutorials/images/target.png" height="16" width="16">
+
+### The Basics
+
+* [Write a Command-Line App](/docs/tutorials/cmdline/)
+<img src="/docs/tutorials/images/target.png" height="16" width="16">
+
+### Servers
+
+* [Get Input from a Form](/docs/tutorials/forms/)
+<img src="/docs/tutorials/images/target.png" height="16" width="16">
+(contains an HTTP server/client pair)
+* [Walkthrough: Dartiverse Search](/docs/dart-up-and-running/contents/ch05.html)
+* [Deploy to Heroku](https://github.com/igrigorik/heroku-buildpack-dart)
+
+{% comment %}
+* How to write a basic server using http_server package (sample link)
+* How to write a web server (sample link)
+* How to use Heroku to deploy (external link)
+
+#### Other server-specific tasks
+
+* How to perform server-side templating (??)
+* How to use SSL to perform secure web messaging (??)
+* Use zones for more control over your asychronous computations (??)
+* How to write a long-running server (??)
+* Using TCP for reliable transmissions (??)
+* Using UDP for lightweight, efficient transmissions (??)
+* Connecting to the postgres database (and concepts for other databases) (??)
+* URL routing for god knows what purpose (??)
+
+{% endcomment %}
+
+### Reference docs
+
+* [dart:io](https://api.dartlang.org/dart_io.html)
+* [args package](https://api.dartlang.org/args.html)
+* [dart:async](https://api.dartlang.org/dart_async.html)
+* [dart:convert](https://api.dartlang.org/dart_convert.html)