fix default prefix
Merge branch 'master' of github.com:nikopol/botaniko

* 'master' of github.com:nikopol/botaniko:
  Gilbert plugin rewritten, better output format.
  Using config plugins.gilbert instead of plugins.bab.
  Gilbert plugin added.
Merge branch 'master' of github.com:nikopol/botaniko

* 'master' of github.com:nikopol/botaniko:
  Typo fixed (want → wants)
  Useless use of 'use utf8' removed.
  utf8 decoding fixed in private messages.
display correctly multilines tweets