Rename get_response -> build_response

It's more descriptive of what the method actually does
and it avoids confusion with the HTTP GET verb.
Remove unused is_json argument
Extract building of Fever response
Extract favicons method
Extract items and total_items methods
Extract links, unread_item_ids and saved_item_ids
Sort helper methods in order of appearance in initialize
Extract method process_params
move racksh out of dev group
Merge branch 'master' of github.com:swanson/stringer
lock activerecord version
Merge pull request #251 from Koronen/refactor-fever-api

Refactor FeverAPI
Set nil entry_id's to story permalinks. closes #264
Guard against nil last_modified from feeds, closes #233
Set bundler to use ruby 1.9.3, closes #215
Update loofah; allow <figure> on the whitelist, closes #208