Revert "Move state parsing from SiteActivity to OpenQuoteApi."

This reverts commit 8b0de2535691d10823b6719d0c27a09fcac07e9f.
Revert "Move quotes parsing from SiteActivity to OpenQuoteApi."

This reverts commit 8b846233366b50e41dbafda871fcc9f713c81283.
Use MessagePack instead of JSON.