Compatibility with IPFS v0.11.0

[Luflosi]

IPFS 0.11.0 has an API incompatibility that needs to be addressed.
According to the release notes at https://github.com/ipfs/go-ipfs/releases/tag/v0.11.0:

HTTP RPC wire format for experimental commands at /api/v0/pubsub changed."

Because of this, the test_publish_subscribe and test_ls tests fail.
The release notes contain detailed information on what changed exactly. This should make it much easier to create a fix.

[kasteph]

Thanks for the detailed issue @Luflosi -- would you be keen to give this a stab? No worries if you don't have time though. Already appreciate bringing this up.

[Luflosi]

Sorry, I don't have the time to work on this.

[kasteph]

@Luflosi no problem, thanks for responding!