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/CDPhysicsComponentTable.cpp

@@ -28,7 +28,7 @@ CDPhysicsComponentTable::CDPhysicsComponentTable(void) {
 	tableData.finalize();
 }
 
-CDPhysicsComponentTable::~CDPhysicsComponentTable(void) {
+CDPhysicsComponentTable::~CDPhysicsComponentTable() {
 	for (auto e : m_entries) {
 		if (e.second) delete e.second;
 	}
@@ -36,10 +36,6 @@ CDPhysicsComponentTable::~CDPhysicsComponentTable(void) {
 	m_entries.clear();
 }
 
-std::string CDPhysicsComponentTable::GetName(void) const {
-	return "PhysicsComponent";
-}
-
 CDPhysicsComponent* CDPhysicsComponentTable::GetByID(unsigned int componentID) {
 	for (auto e : m_entries) {
 		if (e.first == componentID) return e.second;