CDClient cleanup and optimization (#1023)

* CDClient cleanup and optimization

- Use static function to get table name
- Remove unused GetName function
- Replace above function with a static GetTableName function
- Remove verbose comments
- Remove verbose initializers
- Remove need to specify table name when getting a table by name
- Remove unused typedef for mac and linux

* Re-add unused table

Convert tables to singletons

- Convert all CDClient tables to singletons
- Move Singleton.h to dCommon
- Reduce header clutter in CDClientManager

dDatabase/Tables/CDRewardsTable.cpp

@@ -26,10 +26,6 @@ CDRewardsTable::~CDRewardsTable(void) {
 	m_entries.clear();
 }
 
-std::string CDRewardsTable::GetName(void) const {
-	return "Rewards";
-}
-
 std::vector<CDRewards*> CDRewardsTable::GetByLevelID(uint32_t levelID) {
 	std::vector<CDRewards*> result{};
 	for (const auto& e : m_entries) {