* Enforce validators can only use the correct pubkey type
* adapt to variable renames
* Address comments from #2636
* separate updating and validation logic
* update spec
* Add test case for TestStringSliceEqual, clarify slice copying code
* Address @ebuchman's comments
* Split up testing validator update execution, and its validation
* Vagrantfile: install dev_tools
Follow-up on https://github.com/tendermint/tendermint/pull/2824
* update consensus params spec
* fix test name
* rpc_test: panic if failed to start listener
also
- remove http_server#MustListen
- align StartHTTPServer and StartHTTPAndTLSServer functions
* dep: allow minor releases for grpc
* types: add Version to Header
* abci: add Version to Header
* state: add Version to State
* node: check software and state protocol versions match
* update changelog
* docs/spec: update for versions
* state: more tests
* remove TODOs
* remove empty test
* ungitignore
* add docs/.vuepress to enable local builds
* config.js needs to be here, one less step
* docs: make spec in sidebar nicer
* docs: local build instructions
* addr_book_strick=false on local nets
* link to spec
* spec: remove TODO, see #1749 instead
* spec: make issues from TODOs
* update docs on addr_book_strict option
