token.listTokens, token.getToken, token.createToken, token.updateToken (

#120)

* listtokens, gettoken

* add token.md

* wip: createToken test, issue: after createToken but no new token listed in listTokens called

* add createtoken, update test, doc and sidebar

* rename and update jsdoc

* updateToken

* test isDAT will not show the ID

* test no duplicate symbol create

* remove log

* use container.generate which is more efficiency instead of waitForWalletCoinbaseMaturity, apply waitForExpect on some tests to reduce flakiness