v1.3.0
atto has received a major rework in the codebase. It is now a library, which makes it possible to build different tools with it.
The atto program received no changes in it's interface, but a typo in the help text (187dd7d) and a security flaw (50d6ff0) have been fixed and the version of the atto program has been increased to 1.2.1 (it is now independent from the atto-library version).
In addition a new program has been introduced: atto-safesign. With it you can use your Nano accounts while leaving your seed on an offline computer for extra security. See its README for more info.