Update Gemfile.lock
Make gemspec compatible with Ruby 2.0

Remove unnecessary encoding header and add require for date
Remove feeds sample file

Setting up feeds is documented in the README file
Remove extra space character
Add logging
Add feed subscription examples to README file
Do not sync fetch time if there was an error
Extract email address from entry author
Prepend feed URI to path entry permalinks
Update change log
Bump to version 0.3.0