NOTE: from the ticker#Stop documentation:

```
Stop does not close the channel, to prevent a read from the channel
succeeding incorrectly.
https://golang.org/src/time/tick.go?s=1318:1341#L35
```

Refs #2072

These test vectors are needed for comparison with the Rust implementation.
To implement this effectively, a "RandBool" method was added to cmn.Rand.

also, add `priv_validator_laddr` to the template

This is to reduce wait times when initially connecting. This still runs checks
such as whether you still want additional peers.

A test case has been created, which fails if this change is not included.

Our Tempfile was just a wrapper on ioutil that panicked instead of error.

Our Tempdir was a less safe variant of ioutil's Tempdir.

This uses the stdlib's method of creating a tempfile in our write
file atomimc method, with a few modifications. We use a 64 bit number
rather than 32 bit, and therefore a corresponding LCG. This is to
reduce collision probability. (Note we currently used 32 bytes previously,
so this is likely a concern)

We handle reseeding the LCG in such a way that multiple threads are
even less likely to reuse the same seed.

Refs #1712

* change validators to last_commit_info in RequestBeginBlock
* do not send pubkeys with RequestBeginBlock

Refs #1856

This commit makes it such that circle CI only shows the module whose
tests it is currently running in the log, unless a test fails. For each
failing test, it will display the name of all failing tests, along with
their log output. This is done to make
our log output far more scrollable. We lose no information in debugging.

The paper is such a useful resource to anyone building on Tendermint. It should be linked in the ReadMe.

Previously we logged `Testing for i <i>` for all i in [0,100).
This was unnecessary. This changes it to just log the value for i on
error messages, to reduce the unnecessary verbosity in log files.

* Removed unnecessary onStart & onStop calls in reactor

* Refactor OnStart & OnStop in reactor

* Removed redundant OnStart func in reactor

Refs #1772

Reasons:
- this was a bad patch for something not well understood

Lessons learned:
- nobody should be modifying code without understanding the problem
first. it will only result in more technical debt and code rot.
- we never hide information when we suspect a bug or we'not sure what's
going on.

Previously you could not assume that your transaction hash would
appear on chain.

consensus: Fix test for blocks with evidence

This PR changes ABCI time format from int64 (Unix seconds) to WKT (WellKnownType) google.protobuf.Timestamp.

Refs #1857

Reasons:

better precision
standard DT for proto

* update Gopkg.lock
* [makefile] remove extra grep
    - go list excludes vendor by default now
* proto3 timestamp
* [docs/abci-spec] note about serialisation format
* make time non-nullable

Merge 0.23.8 back into develop

This now makes bit array functions which take in a second bit array, thread
safe. Previously there was a warning on bitarray.Update to be lock the
second parameter externally if thread safety wasrequired.
This was not done within the codebase, so it was fine to change here.

Closes #2080

HotFix for 0.22.7, bump to 0.22.8

* p2p: Propose PeerTransport ADR
* adr: Set status to in review
* adr: Add high-level decision
* adr: Extend on the idea of guards
* adr: Rework guards into transport specific filters
* adr: Rename to nodeAddr
* adr: Incorporate review

Hotfix/0.22.7

* .github: Split the issue template into two seperate templates

Now we have different bug report and feature request templates.

* Forgot to add the name, and about fields

secret connection update

This now uses one hkdf on the X25519 shared secret to create
a key for the sender and receiver.
The hkdf call is now just called upon the computed shared
secret, since the shared secret is a function of the pubkeys.

The nonces now start at 0, as we are using chacha as a stream
cipher, and the sender and receiver now have different keys.

Generate keys with HKDF instead of hash functions, which provides better security properties.

Add xchacha20poly1305 to secret connection. (Due to rebasing, this code has been removed)

hkdfchachapoly was a construction we came up with. There is no longer any
reason to use it. We should instead just use xchacha for the remaining use
cases we have. (Symmetrically encrypting the keys in the sdk keys package)

* crypto: Add benchmarking code for signature schemes

This does a slight refactor for the key generation code. It now calls a
seperate unexported method to allow generation from a reader. I think this
will actually reduce time in generation, due to no longer initializing an
extra slice. This was needed in order to enable benchmarking.

This uses an internal package for the benchmarking code, so that this can
be standardized without being exported in the public API. The benchmarking
code is derived from agl/ed25519's benchmarking code, and has copied the
license over.

Closes #1984

This adds a new makefile command, which is used in CI linting, `make check_dep`.
This ensures the toml is in sync with the lock, and that were not pinning to a
branch in any repository.

This also adapts `make get_vendor_deps` to check the lock, in addition to
populating the vendor directory. This removes the need for `make ensure_deps`.

This makes `make get_vendor_deps` consistent between tendermint and the sdk.

Bucky/merge master