refactor: peerRequestQueue

	it's a mistake to make one queue to fit all. Go's lack of algebraic
	types turns a generalized queue into a monstrosity of type
	checking/casting. Better to have individual queues for individual
	purposes.

	Conflicts:
		exchange/bitswap/decision/bench_test.go
		exchange/bitswap/decision/tasks/task_queue.go

	fix(bitswap.decision.PRQ): if peers match, always return result of pri comparison

	fix(bitswap.decision.Engine): push to the queue before notifying

	TOCTOU bug

	1. client notifies
	2. worker checks (finds nil)
	3. worker sleeps
	3. client pushes (worker missed the update)

	test(PQ): improve documentation and add test

	test(bitswap.decision.Engine): handling received messages

	License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

Conflicts:
	exchange/bitswap/decision/taskqueue.go

feat(core) replace config.Config with repo.Repo

@jbenet cool with this?

This declarative style is simpler to compose than the imperative wiring
up of objects.

+ pass context to StartOnlineServices as parameter. one by one, trying
to remove dependencies on node state so these initialization steps can
be broken down.

@jbenet wasn't sure about the terminology here. I'm certain what I wrote
is not entirely correct. Feel free to edit.

@whyrusleeping @jbenet does passing this argument effectively instruct
the dagbuilder to pin recursively?

cc @jbenet @whyrusleeping

move generic packages to thirdparty (see thirdparty/README.md)

core/mount: make non-darwin archs see fuseversion

See the note:

// this file is only here to prevent go src tools (like godep) from
// thinking fuseversion is not a required package by non-darwin archs.

basic reprovider implementation

addr-explosion mitigated adding

mitigated adding our own addresses where received
from peers

see #573

moved our d3view to own repo

d3view is now in its own repo:
https://github.com/jbenet/ipfs-diag-net-d3-vis

This is so we can iterate on it quickly without having to
needlessly waste CI resources.

The repo also installs it for you:

```sh
git clone github.com/jbenet/ipfs-diag-net-d3-vis d3view
cd d3view
sudo make install
```

Feat/eventbegin