Feature/ Lazy Vesting Schedule

[yun-yeo]

** Summary of changes **

Apply lazy vesting schedule to all account at 230000 height
(Estimated: Sun Jun 23 2019 00:50:00 GMT+0000 (UTC))

oracle param update

OracleRewardBand: 1% => 2%

market param update

DailyLunaDeltaCap: 0.5% => 0.1%

Solve #180, #181

** Report of required housekeeping **

• Github issue OR spec proposal link
• Wrote tests
• Updated relevant documentation (docs/)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

======

** (FOR ADMIN) Before merging **

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[dokwon]

Nothing significant, we may want to smooth out vesting rule changes for improved readability

[dokwon]

@YunSuk-Yeo does this pass make lint for you?

[hanjukim]

@dokwon make lint from mine

go get github.com/rakyll/statik
go get github.com/golangci/golangci-lint/cmd/golangci-lint
go: finding github.com/golangci/golangci-lint/cmd/golangci-lint latest
go: finding github.com/golangci/golangci-lint/cmd latest
--> Running lint...
golangci-lint run
go vet -composites=false -tests=false ./...
find . -name '*.go' -type f -not -path "./vendor*" -not -path "*.git*" | xargs gofmt -d -s
go mod verify
all modules verified

[dokwon]

LGTM