* Update config_reader to new TOML

* Fix formatting

The old scheme missed a bunch of dependencies when passing through a
merge. This one is better.

* Commiting to pull

* lmp redone, seems to be working

* Fixes an overflow error in LPM

This subsumes pull request #38 because I was evil.

* Fix LPM lookup

I misunderstood operator precedence.

mbuf_free_bulk() always failed thus always slow path was used.
The problem was threefold:
1. mbuf_ptrs was not correctly set
   (pointer addresses were not used directly, but dereferenced)
2. mbuf_ptrs and buf_addrs_actual have different orderings
3. the size of metadata slots (128 bytes) was not accounted.

* Stop building Cargo, only pass target-cpu=native

We do not aggressively need to pass in +mavx2 etc., since rustc does the
right thing and picks them up. Also we now just use RUSTFLAGs instead of
my random modified Cargo.

* Add dependency tracking and run to completion

* Add an embedded scheduler

* Fix line length

- Switching to nightly toolchain
- Installing libnuma-dev package

Change delay so it can use virtual ports, and also fix some issues with build_container.

* Add virtual port

* Add support for running pipelines on systems without a DPDK port or packet generator.

Run build in a container, that is already mostly set up (e.g., no building Cargo). The main problem is that this is currently not very generic (e.g., the builds are done as `root`, making `dist_clean` and other things a bit painful to run). But it does speed up the Travis jobs significantly.

* Record when a task was last run

* Abstract ports into traits for things from which packets can be received, and traits for things to which packets can be sent. Among other things this simplifies queues.

- Account for time running each pipeline. [Need to check performance
impact of this change.]
- Add ability to place a task on a particular core.

Provide a mechanism to shutdown schedulers and provide a mechanism to
get all threads to pause. This is a step towards things like
snapshotting.

Add various additional checks for travis

- Check formatting
- Make sure all examples are actually listed

Some notes about this rather painful PR:

Travis does not add the cargo install location to its path, which means
rustfmt is not found. This fix puts rustfmt in-tree to solve this
problem. Additionally, rustfmt changed some of its formatting rules for
the better (e.g., actually reordering imports), this change fixes format
appropriately.

We also disabled calling ldconfig when running make install for cargo, which otherwise fails.

This was mostly done so that (a) cores could run without serving any
ports and (b) so I could make other changes to the scheduler.

Adding KNI logic was becoming annoying without this change.

* Switch to using error-chain

Also includes some fixes for lint problems.

* Add libnuma

* Add a bind call when creating thread

* Some random NUMA related changes

* Add libnuma-dev to .travis.yml

* Remove Cargo.lock from the set of files copied

We don't check it in anymore, and it moved?

* Hopefully fix Cargo?

* Remove SIMD, update DPDK, temp fix for Cargo

Cargo issue #3340 making it a bit hard to pass some build tests, and
then I changed many things.

* Fix DPDK flag

* Remove pie

* Add a way to get cache aligned allocations

* Remove padding in PMD stats

* Move to using cache aligned allocation

Gets rid of ugly pad fields

To use with OVS rings need to use shared libraries, screwing everything
up a bit more

This has about a 2.5% overhead, but seems useful for that.

* Allow NetBricks to be built within container

* Fix README

Can't use `igb_uio` inside a container anyways.

Also change `build.sh` so that it updates `clippy` before running

The main problem now is limiting memory usage