Replace `:foo => bar` notion with `foo: bar`
Merge pull request #149 from makimoto/hash_notion

Replace `:foo => bar` notion with `foo: bar`
Fix api/pin#all to render purified link
Do escapeHTML to item's link while managing pins

Server always returns escaped (purified) link.
Escape link on opening pin
Fix undefined State object
Merge pull request #150 from eagletmt/purify-pins-link

Purify pins link
Merge pull request #151 from ykzts/fix-undefined-state-object

Fix undefined State object