Open story in background tab when clicked with metaKey.
Don't fail if logger is not defined

Introduced in a recent commit, a feed would be marked as "failed" if the logger is not defined (nil) when the feed content hasn't changed (304 Not Modified).
Merge pull request #234 from mherb/fetch-feed-logger

Don't fail if logger is not defined
Set feed status to green when parsing feeds returns 304
Make export serve a file
Merge pull request #236 from jeroenj/last-modified

Set feed status to green when parsing feeds returns 304
Merge pull request #237 from jmazzi/feature/export_to_file

Make export feeds serve a file
Opera works with e.ctrlKey.
Use .opml as file extension when exporting OPML
Set content type to 'application/xml'
Added some test examples for handling click on story.
Correct it examples names.
Check for api_key existing in params hash first.
Moved check for api_key into authenticated? method.
Merge pull request #242 from gaynetdinov/fix-issue-in-fever-authentication

undefined method `downcase' for nil:NilClass in FeverAPI
Make it possible to mark feeds as read through Fever API
Added some basic specs for fever_api.
Merge pull request #238 from Koronen/opml-file-extension

Use .opml as file extension when exporting OPML
Merge pull request #246 from jeroenj/mark_feeds_as_read

Make it possible to mark feeds as read through Fever API
Merge pull request #248 from gaynetdinov/specs-for-fever-api

Some basic specs for fever api.