Update jquery.slimscroll.js

3 changes to :

- Fix displaying when the content of 'me' is created with javascript (two timeout added)
- Respect the option "start=bottom" when .slimscroll() is called again but only if the scroll is on the bottom when .slimscroll() is called again.

Hope my explanations are clear (I'm not a native speaker, sorry). Do not hesitate to ask me for further clarification.