Releases and a question

[betam4x]

Releases appear to return an empty response:
irb(main):052:0> github.repos.releases.list 'rails', 'rails'
=> #<Github::ResponseWrapper @Body="[]">

Also, is there any way to get a file/directory listing and contents of a particular tag, branch, or commit?

Lets say i want a file listing of a repo tagged 1.0 and my current master is tagged at 1.4 (75 commits later), is there any way to do this? Basically i'd like to implement version history (click the 1.0 link, get the state of the master branch at 1.0 and browse through/look at code) Anyone have any example code they can share?