Merge pull request #7 from sparkfun/master

namespace FeedWriter
Examples with including files
Use printFeed() instead of generateFeed()
Merge branch 'master' into examples
Fixed attribute string: Removed double whitespace between the key-value pairs.
Renamed the getContentType() method.

It's actually the MIME type which is returned and then used for the HTTP Content-Type header field.
Added support for atom:link elements with relation=self. Fixes #5

See http://validator.w3.org/feed/docs/warning/MissingAtomSelfLink.html
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Fixed warning on RSS2 example: Image title didn't match channel title.
Merge branch 'examples'
Fixed warning on minimum RSS2 example: Image title didn't match channel title.
Implemented function to add custom XML namespaces. This fixes #9.

The namespace prefix and name can be set by invoking the addNamespace method of the Feed class.
add Item&setContent() for Atom feeds

- Make it easy to get a <content> element on Atom entries
- Also spells "enclosure" correctly - "setEncloser" -> "setEnclosure"
- Fixes Atom test file on case-sensitive filesystems
- Tack a date_default_timezone_set() on tests, to avoid warnings