* Release management using CircleCI

* Changelog updated

there is no such file https://storage.googleapis.com/golang/go1.12.0.linux-amd64.tar.gz

Fixes #3405

- update docker image on circleci
 - remove GOCACHE=off from Makefile (see:
 https://tip.golang.org/doc/go1.12#gocache)
 - update badge in readme
 - update in scripts/install
 - update Vagrantfile
 - update in networks/remote/integration.sh
 - tools/build/Makefile

in the attempt to fix https://circleci.com/gh/tendermint/tendermint/43165

also

    code is simplified by running gofmt -s .
    remove unused vars
    enable linters we're currently passing
    remove deprecated linters

As per conversation here: https://github.com/tendermint/tendermint/pull/3218#discussion_r251364041

This is the result of running the following code on the repo:

```bash
find . -name '*.go' | grep -v 'vendor/' | xargs -n 1 goimports -w
```

* add go-deadlock tool to help detect deadlocks

Run it with `make test_with_deadlock`. After it's done, use Git to
cleanup `git checkout .`

Link: https://github.com/sasha-s/go-deadlock/
Replaces https://github.com/tendermint/tendermint/pull/3148

* add a target to cleanup changes

```
panic: failed to unmarshal json: unexpected end of JSON input

goroutine 1 [running]:
main.main()
	/root/gelgo/src/github.com/tendermint/tendermint/scripts/json2wal/main.go:66 +0x73f
```

Closes #3146

* fix build scripts

Search for the right variable when introspecting Go code. `Version` was
renamed to `TMCoreSemVer`.

This is regression introduced in
b95ac688af

* fix all `Version` introspections.

Use `TMCoreSemVer` instead of `Version`

* split immutable and mutable parts of priv_validator.json

* fix bugs

* minor changes

* retrig test

* delete scripts/wire2amino.go

* fix test

* fixes from review

* privval: remove mtx

* rearrange priv_validator.go

* upgrade path

* write tests for the upgrade

* fix for unsafe_reset_all

* add test

* add reset test

* update go version & other cleanup

* fix lints

* go one.eleven.four

* keep circle on 1.11.3 for now

* be like the SDK makefile

* arm: add install script, fix Makefile

* ...

* update changelog, add authors script

* update changelog

* update changelog

* [install scripts] update go version, remove upgrade

- upgrading OS is out of scope of installation scripts

* add missing log statement

Refs https://github.com/tendermint/tendermint/pull/2642#discussion_r225786794

* tests: use make localnet

based on @jackzampolin work in:
https://github.com/cosmos/cosmos-sdk/pull/2067

* keep the p2p tests for now

* fixes after my own review

* nohup

* remove nohup

* Implement BFT time

* set LastValidators when creating state in state helper

for heights >= 2

* add json2wal & fix wal2json

* fix bug

* Update main.go

* add wal2JsonTest file

* Delete wal2JsonTest

Currently the top level directory contains basically all of the code
for the crypto package. This PR moves the crypto code into submodules
in a similar manner to what `golang/x/crypto` does. This improves code
organization.

Ref discussion: https://github.com/tendermint/tendermint/pull/1966

Closes #1956

This reverts commit 58d0c8de89.

* Add OSX install script

* Address PR comments

This reverts commit d02c5d1e30.

Fixes
https://circleci.com/gh/tendermint/tendermint/12923?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

Also, fix consensus liveness issue.

This reverts commit 96a3502

This is a maintenance change to move the private validator package out
of the types and to a top-level location. There is no good reason to
keep it under the types and it will more clearly coommunicate where
additions related to the privval belong. It leaves the interface and the
mock in types for now as it would introduce circular dependency between
privval and types, this should be resolved eventually.

* mv priv_validator to privval pkg
* use consistent `privval` as import

Follow-up to #1255

* generate RPC docs using Slate (#691)

* update changelog

* skip if branch not develop

* slate: only build if rpc/core has changes

* fetch develop to compare against

* slate: build on master only

* [rpc/core] use original repo, not fork in README

Reasons:
1) all deps we're using should be passing tests (including external)
2) deps can require complicated setup for testing
3) the person responsible for releasing Tendermint should be cautious
when updating a dep

* use increment and decrement operators.

* remove unnecessary else branches.

* fix package comment with leading space.

* fix receiver names.

* fix error strings.

* remove omittable code.

* remove redundant return statement.

* Revert changes (code is generated.)

* use cfg as receiver name for all config-related types.

* use lsi as the receiver name for the LastSignedInfo type.

To achieve faster feedback cycles for our feature PRs this change
reduces the average buildtime from 35 to ~6min by utilising their new
2.0 offering based on docker and nomad. We make use of parallel build
steps wherever possible so that the duration is determined by the
slowest test suite (p2p).

This is an intermediate step until we move our CI/CD completely
on-premise for more control and added security.