Adding barback examples.

Adding barback examples.

BUG=
R=nweiz@google.com

Committed: https://code.google.com/p/dart/source/detail?r=34851

[Shams, 2014-03-17 17:37:20]

Adding the transformer examples to the barback repo. I hope I did this
correctly!!

[nweiz, 2014-03-17 19:48:29]

I'd move the files in asset/ to web/, so the user can just run "pub serve" and
see what's going on. Similarly, it would be nice to have one of the markdown
files compile to index.html so that the user can just go to the root-level
server URL.

Also, there should probably be a README.md file explaining the larger picture of
the example.

[Shams, 2014-04-08 18:37:56]

Nathan, I have incorporated your feedback. Thanks so much.

PTAL!

[nweiz, 2014-04-08 21:03:02]

lgtm

https://codereview.chromium.org/197533004/diff/20001/pkg/barback/examples/mar...
File pkg/barback/examples/markdown_converter/README.md (right):

https://codereview.chromium.org/197533004/diff/20001/pkg/barback/examples/mar...
pkg/barback/examples/markdown_converter/README.md:1: This example shows how to
write a simple pub transformer.
Mention that the transformer converts Markdown files to HTML files.

https://codereview.chromium.org/197533004/diff/20001/pkg/barback/examples/sim...
File pkg/barback/examples/simple_transformer/README.md (right):

https://codereview.chromium.org/197533004/diff/20001/pkg/barback/examples/sim...
pkg/barback/examples/simple_transformer/README.md:1: This example shows how to
write a simple pub transformer.
Mention that the transformer adds a copyright header to ".txt" files.

[Shams, 2014-04-08 23:20:06]

Committed patchset #2 manually as r34851 (presubmit successful).

[nweiz, 2014-04-08 23:55:14]

On 2014/04/08 23:20:06, shaza wrote:
> Committed patchset #2 manually as r34851 (presubmit successful).

I should have caught this earlier, but "examples" should be named "example" to
follow the package layout guidelines.