* Misc. bugs fixed in DatabaseFunctions.php and Skin.php.
* install-utils, install and update utilise Database objects instead of handling their own connections
* schema change for RC improvement -- added rc_type, rc_moved_to_title and rc_moved_to_ns
* Made updating of page view stats faster my buffering them in a
HEAP table until many pages can be updated at once.
tables.sql:
* hitcounter table
patch-hitcounter.sql:
* hitcounter table
update.php:
* Creating hitcounter table when necessary
