add asynchronouse image preload
Fix and refactor to page for subscribe
Fix locale in subscribe edit popup
Support application/rdf+xml as feed URL

By this change, the following MIME types will be supported:

* application/atom+xml
* application/rdf+xml
* application/rss+xml

I just update FeedSearcher to v0.0.4, which supports what this title says.
For more detail on MIME types, my recent blog post might help you.

* http://r7kamura.hatenablog.com/entry/2013/03/18/012636
* https://github.com/fastladder/feed_searcher/compare/v0.0.3...v0.0.4
Remove not_subscribed variable
Replace `new Date-0` -> `(new Date()).getTime()`

ref: https://github.com/fastladder/fastladder/pull/82#discussion_r3405847
Extract `Feed.initialize_from_uri` to parse and initialize feed.
Merge pull request #82 from ykzts/fix/locale-subscribe-edit-popup

Fix locale in subscribe edit popup
Merge pull request #81 from ykzts/fix/subscribe-page

Fix and refactor to page for subscribe
Merge pull request #83 from r7kamura/support_rdf_xml

Support application/rdf+xml as feed resource
support headless konacha test
fix konacha test runner environment
Add travis support with konacha
User friendly rate changer
Merge pull request #84 from onk/extract_initialize_from_uri_method

Extract `Feed.initialize_from_uri` to parse and initialize feed.
fix crawler for redirected URL(e.g. http://b.hatena.ne.jp/hotentry.rss)
Move XML generation logic to view using builder.
Fix missing date order
Add a content type for opml
Change a content type of opml