Removed pointers from ColumnStruct references
Removed pointers from ordered columns
Renamed Compiler interface to Compiles
Removed pointers from clauses
Removed pointers and renamed DeleteStatement to DeleteStmt
Removed pointers and renamed InsertStatement to InsertStmt
Removed the ColumnElement interface and added a recursive inner clause to ColumnStruct
Removed pointers from CREATE and DROP TABLE statements
Removed pointers from SELECT statements
Renamed ColumnStruct to ColumnElem
Removed spacing in BinaryClause layout
Moved parameters to a separate file