[SCIM] Skim handbook updated

[LiuCougar]

Hi all,

Based on recent received feedbacks, I updated the skim handbook, changelog:

Added another method to start skim
Two new FAQ
Updated one FAQ to reflect current skim status
Reformat a warning

you can access it at:
http://freedesktop.org/~cougar/skim/doc/user/

any comments are welcome

Enjoy,
Cougar
-- 
"People's characters are strengthened through struggle against
difficulties; they are weakened by comfort."
- Old Chinese adage