Bump version for 1.3.1
Update CHANGELOG for 1.3.1
Test both nokogiri and ox sax-machine handlers
Relax sax-machine dependency to allow 1.0.0
Update to sax-machine 1.0

[closes #234]
Loosen dependency requirements
Upgrade to Rspec 3.0
Remove invalid xml for itunes
Moved lstrip before preprocess.

Leading whitespace causes parse errors. If preprocess is called on a feed that has leading whitespace it can result in a missing parsed feed.
Bump version for 1.4.0
Update CHANGELOG for 1.4.0
Update README.md

Correct previous name. (This bug also exists on the website).