pinboard-0.7.5: changelog.md

__v0.7.5__

replacing/removing io-streams in favor of http-client

__v0.6.5__

compatability with both time < 1.5 and time >= 1.5

__v0.6.4__

add ability to update a post directly from a Post record (save an existing post)

__v0.6.3__

add ToJson instances
add pretty print function