* changed tableExist and fieldExist to $db->hasTable(table) +
$db->hasColumn(table, column)
* new configurable: database_log - can log database queries and show in
website source when logged as super admin
* removed debug_level configurable, enabled by default when logged on
super admin
* added OTS_Account:getCountry()
* added posibility to load OTS_Player partially, and without skills
* (internal) changed depracated $ots->createObject() functions with
their OTS_ equivalents
* (internal) removed unused code
* removed useless spells.spell column that was duplicate of spells.words
* Usage_Statistics reports now plugin version too
* (internal) removed $hook_types array, using defined() and constant() functions now
* (internal) optimized Spells class
