1) empty robot templates have been moved from
'tools' to src/robots (documentation was updated),
and are now included in source distributions
Removed tools directory which is now empty.
2) Include documentation in source distributions
(but only player_manual will be installed)
3) Added missing bullet documentation files
and removed unnecessary cmake files.
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@1588 178a84e3-b1eb-0310-8ba1-8eac791a3b58
