Simplify example instructions and fix broken examples

Also convert to AsciiDoc while we're at it.

examples/rest_pastebin/README.md

@@ -1,60 +0,0 @@
-REST pastebin example
-=====================
-
-To try this example, you need GNU `make` and `git` in your PATH.
-
-To build the example, run the following command:
-
-``` bash
-$ make
-```
-
-To start the release in the foreground:
-
-``` bash
-$ ./_rel/rest_pastebin_example/bin/rest_pastebin_example console
-```
-
-Then point your browser at [http://localhost:8080](http://localhost:8080).
-
-Usage
------
-
-To upload something to the paste application, you can use `curl`:
-
-``` bash
-$ <command> | curl -i --data-urlencode paste@- localhost:8080
-```
-
-Or, to upload the file `my_file`:
-
-``` bash
-curl -i --data-urlencode paste@my_file localhost:8080
-```
-
-The URL of your data will be in the location header. Alternately, you can visit
-http://localhost:8080 with your favorite web browser and submit your paste via
-the form.
-
-Code that has been pasted can be highlighted with ?lang=<language> option if
-you have [highlight](http://www.andre-simon.de/doku/highlight/en/highlight.html)
-installed (although `pygments` or any other should work just fine).
-
-This will show the contents of the HTML file:
-
-``` bash
-curl -i --data-urlencode paste@priv/index.html localhost:8080
-curl <url from location header>
-```
-
-If your terminal supports color sequences and `highlight` is installed,
-the following command will show the same contents but with HTML syntax
-highlighting.
-
-``` bash
-curl <url from location header>?lang=html
-```
-
-If you open the same URL in your web browser and your web browser tells
-Cowboy that it prefers HTML files, you will see the file highlighted
-with special HTML markup and CSS. Firefox is known to work.