Mixed imports

[ComSecNinja]

I tried to explain this but it proved nearly impossible to do so in a manner I could even comprehend myself. Hence, an example:
github.com/ipfs/go-libp2p/p2p/peer/peer.go imports gx/ipfs/.../go-multihash as mh and gx/ipfs/.../go-ipfs-util as u. In block.go line 22 Block expects gx/ipfs/.../go-multihash.Multihash but u.Hash returns github.com/jbenet/go-multihash.Multihash. There are multiple conflicts of this kind out there, of which I list those known to me here:

• github.com/ipfs/go-ipfs/blocks
• github.com/ipfs/go-libp2p/p2p/net/swarm/addr
• github.com/ipfs/go-libp2p/p2p/net/filter
• github.com/ipfs/go-libp2p/p2p/nat
• gx/ipfs/QmSN2ELGRp4T9kjqiSsSNJRUeR9JKXzQEgwe1HH3tdSGbC/go-libp2p/p2p/net/swarm/addr
• github.com/ipfs/go-libp2p/p2p/net/transport
• github.com/ipfs/go-ipfs/thirdparty/testutil

A complete dump of errors when running go get in examples/api/service, as per my conversation with @whyrusleeping at freenode#ipfs.

[ghost]

Yeah, we need to go through all examples and make sure they're up-to-date and work :(

Closing in favor of #67