Last Letter - double reacts, fail messages and others..

[probablyraging]

• Issue with bot sometimes adding a pass and fail reaction when failing - reference
• Multiple fail messages when two types of fails occur in the same message - reference
  • Make sure it actually fails when the first failing criteria is met
• Need to ignore numbers and symbols better, especially at the end of a word - reference
  • ...and not use either as a next letter requirement
• Maybe we ignore messages which include a space or just don't allow chatting in that channel at all
• Single letter messages are being passed, even though we are supposed to be checking a dictionary - reference
• onReady fetch the last message in the channel

[probablyraging]

Partial fixes added in 0d426db