When I try to sign up, they want write access to my repos, to the org repos I am a member off, etc. Let's make this clear: I am not giving to anyone write access to my repos and certainly not to other people repos. Read permissions should be enough. You want to add something to my repo? Do a PR.
So what remains, is to test the command line app without using the online service. But the documentation is bad, so I am not able to do that either. No docs for scala, when trying with go, I get cryptic errors, like 'no supported Go build tools detected' until I install a third party go binary (godep or govendor) and 'could not find Go project folder (maybe your Go build tool is not supported?)'.
The idea is great, the execution needs some work.