aws/s3 0.3.0 release

aws/s3 is client library for Amazon's Simple Storage Service's REST API
(http://amazon.rubyforge.org).

0.3.0 is a feature release along with several enhancements and bug fixes
reported by the community.

One important bug fix is a SignatureDoesNotMatch exception that was popping
up for people on ruby 1.8.5.

One new feature is richer logs with accessors for each field of a log file
line.

Upgrade:

  sudo gem update aws-s3

Changes:

- Ensure content type is eventually set to account for changes made to
  Net::HTTP in Ruby version 1.8.5. Reported by [David Hanson , Stephen
  Caudill, Tom Mornini <tmornini@engineyard.com>]

- Add :persistent option to connections which keeps a persistent connection
  rather than creating a new one per request, defaulting to true. Based on a
  patch by [Metalhead <metalhead@metalhead.ws>]

- If we are retrying a request after rescuing one of the retry exceptions,
  rewind the body if its an IO stream so it starts at the beginning. [Jamis
  Buck]

- Ensure that all paths being submitted to S3 are valid utf8. If they are
  not, we remove the extended characters. Ample help from [Jamis Buck]

- Wrap logs in Log objects which exposes each line as a Log::Line that has
  accessors by name for each field.

- Various performance optimizations for the extensions code. [Roman LE
  NEGRATE <roman2k@free.fr>]

- Make S3Object.copy more efficient by streaming in both directions in
  parallel.

- Open up Net:HTTPGenericRequest to make the chunk size 1 megabyte, up from 1
  kilobyte.

- Add S3Object.exists?

marcel