Add tests for RpcController#update_feed
Bugfix: use Hash#merge! instead of Hash#merge

params.merge don't modify self so `link` in JSON data will be ignored, so Item.create raises ActiveRecord::StatementInvalid.
Stop modifying `params`, use copy
Accept @makimoto's review

https://github.com/fastladder/fastladder/pull/79#discussion_r3406321
Fix a subscribe page if has querystring
Remove constraints
Fix ApplicationController#url_from_path

ref: https://github.com/fastladder/fastladder/pull/93#issuecomment-15038989
Fix endpoint url on user controller spec.
Merge pull request #79 from fastladder/rpc_controller_update_feed_spec

Add test for RpcController#update_feed (and tiny bugfix)
Merge pull request #94 from aerith/fix-user-spec-endpoint

Fix endpoint url on user controller spec.
s/Factory/FactoryGirl.create/

See also 700162c3b6a45c8644a01e70a50def1821351505
Merge pull request #93 from ykzts/fix/subscribe-url-querystring

Fix a subscribe page if has querystring
Fix fetch body from RSS 2.0
Merge pull request #95 from ykzts/fix/fetch-body-rss-2

Fix fetch body from RSS 2.0
add spec for Item#to_json

To write spec easily, use as_json instead of to_json.
fix String#scrub_html

Because feedzirra(lib/feedzirra/core_ext/string.rb) introduce String#sanitize,
String#scrub_html cannot call ActionView::Helpers::SanitizeHelper#sanitize.
Merge pull request #96 from mzp/fix_relative_date

Fix relative date
fix tiny bug

JSON から新規購読できない
Merge branch 'master' of github.com:fastladder/fastladder
Subscribe not Feed URL on RPC.