* Update validator commission fields
* Remove CommissionChangeToday and update to use CommissionChangeTime
* Implement commission as a first class citizen type
* Implement stringer for Comission
* Move commission type and logic to new file
* Add new commission errors
* Add commission to create validator message
* Implement and call UpdateValidatorCommission
* Update godoc for UpdateValidatorCommission
* Add Abs to the decimal type
* Implement new SetValidatorCommission
* Update decimal short godocs
* Move set initial commission logic
* Move initial commission validation to Commission type
* Update initial validator commission logic and unit tests
* Remove commission update time from struct and move to validator
* Update validator create handler tests
* Implement commission logic for CLI
* Fix make lint failure
* Fix make cover failure
* Update edit validator logic to handle new commission rate
* Fix lint and cover
* Update create/edit validator simulation to include commission params
* Update MsgEditValidator godoc
* Update pending log
* Update staking tx docs
* Fix CLI create validator test
* Update variables names for commission strings
* Merge UpdateTime into Commission type
* Update create-validator usage in docs
* Update more docs with examples
* More doc updates
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