Changed kernel build caching to use kerncache option, rather than pkgcache option...

Changed kernel build caching to use kerncache option, rather than pkgcache option.  Fixed --postconf and --callback for builds that do not require them.  Removed delay when removing package sin the system profile.  This is now catalyst 1.1.0, so enjoy.

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/catalyst/trunk@474 d1e1f19c-881f-0410-ab34-b69fee027534