4.0.0 does not respect tarball sha256sum

[Will Hayworth]

Compare line 61 of tarball.rb on master vs the 4.0 tag. This is fixed now, obviously, but a release is merited. I don't know about anyone else, but this is a blocker for me because I'm trying to use the cookbook with version 3.0 (I'll just use what's on master).

[Michael Klishin]

@wsh I wanted to release 4.1.0 with #246 in but fair enough, that can go into a later version.

[Michael Klishin]

Closing in favour of #262.