Replace sendMoneyInChat with the canonical way

[zackster]

• Replace all instances of sendMoneyInChat with the below code:

bot.chat.send(channel, {
    body: 'This is a test.  But +0.01XLM@zackburt'
  }, {
    confirmLumenSend: true
  });

• Remove sendMoneyInChat from keybase-bot
• Run the test suite