Refactor bytomcli via cobra (#222)

Refactor bytomcli via cobra (#222)

* Fix rpc server error (#195)

* Reduce code duplication

* Add exit code

- add exit code for various exceptions.

* Exit after clientCall

* Refactor list-keys and delete-key

* Refactor list-accounts

* Refactor list-assets, add delete-account, etc

* Refactor update-account-tags

* Refactor cmds about access token

* Add txfeed related commands

- also a bit refactor.

* Delete jsend

* Resolve merge conflicts

* Add new files

* Pass golint

* Refactor create account receiver

* Refine commands help

* Use interface{} type instead of []string

* Refactor list-transactions,list-balances and list-unspent-outputs

* Refactor build-transaction

* Refactor sign-transaction and submit-transaction

* Replace bytomcli with cobra

* new branch base

* Refactor multiple commands

Updated:
- block-height
- is-mining
- gas-rate

Removed(bytomd):
- net-listening
- net-syncing
- peer-count

* Update block-related commands

* Refactor list cmd

* Update create-key and create-access-token

* Update txfeed

* Try to fix commit update

* build-transaction and sign-transaction

* code clean and unit-test

* Add cmd sign-submit-transaction

* List assets

* Use id instead of tx_id

* list one entry by id

* Delete transaction index

* Don't return error when no data

* Remove useless files

* List transactions by account id

* Format json tag

* Add asset alias on list-balances

* Add asset alias on list-unspent-outputs

* Add create-account-receiver experimentally

* Add account alias on list-unspent-outputs

* Update according to the preview review

* Revert accesstoken

* Delete useless code

* Rename to bcr

* Support build tramsaction by alias

* Add error log in pseudohsmSignTemplate

* Fix build spend transaction template

* Change dashboard

* Change dashboard.go

* Add btm alias

* Support retire transaction

* Refine net-info

* update dashboard.go

* update dashboard.go

* Support create account by multi-sign

* Multi-signature is avaliable

* Chang error code name

* update dashboard.go

* Update README.md roughly

* update dashboard.go by fixing build transaction with receiver

* Update README.md

* update dashboard.go by fixing create account/asset