bytes! macro to literal bytes
to new inner attribute syntax
crate and import changes
visibility changes for structs
impl ToStr to impl Show, formatting/show changes
sha1 fn signature changed (returns slice instead of owned data as in libuuid)
obsolete syntax fixes for owned pointers (mostly conversion to Vec and String)
transform from_utf8_owned's return type Result to Option
misc changes (is the closure type lifetime syntax correct?)