Add new scheme command : ft-rl-redisplay. It will be used later by smart-prompt to update new fields in the prompt
smart-prompt.scm will decide instead of color.scm to print or not the received message
Merge pull request #13 from vadmeste/feature/add_ft_rl_redisplay_command

Add new scheme command : ft-rl-redisplay
Merge remote-tracking branch 'upstream/master' into feature/new_chat_mode
/quiet-mode : Add new chat mode
Merge pull request #14 from vadmeste/feature/new_chat_mode

extensions: new chat mode 
- The new mode prevents from printing messages as they arrive and it will keep them in a buffer instead
- The prompt shows the count of the unread messages
- When the user enters /next or a keyboard shortcut, all unread messages belonging to the first sender user will be shown, the current buddy will be automatically switched too
extensions: `hash-count` only available on guile 2.0.9

- provide backward compatibility wrapper for hash-count
- remove tabs added in smartprompt.scm code
- standardize on 80column when possible