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/CDActivitiesTable.cpp

@@ -1,6 +1,5 @@
 #include "CDActivitiesTable.h"
 
-//! Constructor
 CDActivitiesTable::CDActivitiesTable(void) {
 
 	// First, get the size of the table
@@ -48,15 +47,6 @@ CDActivitiesTable::CDActivitiesTable(void) {
 	tableData.finalize();
 }
 
-//! Destructor
-CDActivitiesTable::~CDActivitiesTable(void) {}
-
-//! Returns the table's name
-std::string CDActivitiesTable::GetName(void) const {
-	return "Activities";
-}
-
-//! Queries the table with a custom "where" clause
 std::vector<CDActivities> CDActivitiesTable::Query(std::function<bool(CDActivities)> predicate) {
 
 	std::vector<CDActivities> data = cpplinq::from(this->entries)
@@ -66,7 +56,6 @@ std::vector<CDActivities> CDActivitiesTable::Query(std::function<bool(CDActiviti
 	return data;
 }
 
-//! Gets all the entries in the table
 std::vector<CDActivities> CDActivitiesTable::GetEntries(void) const {
 	return this->entries;
 }