basic ADR for gov split vote

docs/architecture/adr-033-gov-split-vote.md

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+# ADR 028: Public Key Addresses
+
+## Changelog
+
+- 2020/10/28: Intial draft
+
+## Status
+
+Proposed
+
+## Abstract
+
+This ADR defines a validator to split votes into several pieces. Assuming a group with multisig address vote on a proposal, the members could have different opinion. In this case spliting voting power into pieces could be useful.
+
+## Context
+
+Currently, an address can cast vote with only one of vote options(yes/no/abstrain/no_with_veto) and full votingPower of that address goes to one vote option.
+
+To be more accurate in voting process, allowing the split of voting power could be very helpful.
+
+Assume that there are 100 members associated to a single validator address and they participate in voting process via that address.
+
+60 members cast yes vote, 30 members cast no vote, 5 members abstrain, 5 members no_with_veto.
+If they just cast yes vote for 100% of voting power, it won't be fair enough for 40 members especially when that validator's voting power is quite high.
+
+If total voting power is 10000, and on above case we split voting power into 6000, 3000, 500, 500 pieces.
+
+## Decision
+
+We will modify cli command from 
+```sh
+simd tx gov vote 1 yes --from mykey
+```
+to 
+```sh
+simd tx gov vote 1 "yes=60,no=30,abstain=5,no_with_veto=5" --from mykey
+```
+
+```
+simd tx gov vote 1 yes --from mykey
+```
+Old command still works and it's automatically converted to like below
+```
+simd tx gov vote 1 "yes=1" --from mykey
+```
+
+If you want to set VoteOption=1, you can omit `=1`.
+```
+simd tx gov vote 1 "yes,no" --from mykey
+``` 
+is same as
+```
+simd tx gov vote 1 "yes=1,no=1" --from mykey
+```
+
+## Consequences
+
+### Positive
+- It can make more accurate voting process especially for big validators.
+
+### Negative
+
+### Neutral
+
+## References