Use correct package as root of dependency graph

[remram44]

Fixes #33

[remram44]

Some other fixes are included, since the project didn't build with --features debug (4c5e60d), and there were some issues with the debug output (e955ce2, 0f35e13).

[remram44]

Updated my fix for rust-lang/cargo#4571. Cargo.toml files created from current cargo make cargo-graph fail with error: No root table found for toml file.

[kbknapp]

sorry for missing this! My work schedule has been nuts the last few months and I haven't had time to keep up with these subcommands. Could you rebase on the latest master and this shouod be good for a merge.

[remram44]

Sure thing! Rebased without conflict. Note that a cargo update might be required to build on current nightly, rustc-serialize 0.3.18 fails to build.

[kbknapp]

thanks! If the latest rustc-serialize isn't breaking and builds on stable-2 I don't mind just rolling that up into this PR

[kbknapp]

I'm on mobile right now though and can't test if that's the case

[remram44]

No problem, committed a cargo update. Builds on stable (1.21) and nightly. Thanks!

[kbknapp]

Thanks!