added date_type_t, time_type_t and timestamp, ensure allocated postgres resources are released, split repository into basic_repository and repository.

source/orm/query/internal/column_value_pair.cpp

@@ -9,8 +9,8 @@ column_value_pair::column_value_pair(std::string name, utils::database_type valu
 , value_(std::move(value)) {
 }
 
-column_value_pair::column_value_pair(const table_column &col, utils::database_type value)
-: column_(col)
+column_value_pair::column_value_pair(table_column col, utils::database_type value)
+: column_(std::move(col))
 , value_(std::move(value)) {
 }
 
@@ -36,6 +36,7 @@ bool operator==( const column_value_pair& lhs, const column_value_pair& rhs ) {
 }
 
 bool operator!=( const column_value_pair& lhs, const column_value_pair& rhs ) {
+  using namespace matador::utils;
   return !( lhs == rhs );
 }
 }