Fix StartRepl function. Didn't work with python3.3 and lein repl
Replace vim-sneak with vim-firebolt

- Vim-sneak is a great plugin, and very well designed, it just doesn't
  work for me.
- For one, I don't like the idea of sneak searching past the current
  line, I think it introduces confusion and blurs the line too much
  between a find-char and a search
- It's also too much overhead to decide between an f,t, or s for an
  inline search
- Also the inability to use the "s" mapping in operator pending mode
  introduced a lot of overhead as well
Update lazy-loading of plugins