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/CDPropertyEntranceComponentTable.cpp

@@ -32,12 +32,6 @@ CDPropertyEntranceComponentTable::CDPropertyEntranceComponentTable() {
 	tableData.finalize();
 }
 
-CDPropertyEntranceComponentTable::~CDPropertyEntranceComponentTable(void) = default;
-
-std::string CDPropertyEntranceComponentTable::GetName() const {
-	return "PropertyEntranceComponent";
-}
-
 CDPropertyEntranceComponent CDPropertyEntranceComponentTable::GetByID(uint32_t id) {
 	for (const auto& entry : entries) {
 		if (entry.id == id)