Implemented methods to build a query and implosion of all parts to string
Modified method to join tables
Added default signatures of methods
Modified call of methods
Added alias to table at join method
Implemented join table to test
Implemented testes for model
Modified private to protected vars to enable extends class
Implemented class to create query for Insert statement
Added test to Insert class
Changed modifier of implode_r() to protected to enable access from child class
Implemented Update statement classes for create query for update tables
Corrections about commit of statement
Implemented method to execute simple queries
Implemented method to insert and update from model
Implemented protected atribute to set alias of table
Correcting string to create query
Added alias atribute to query
Correcting string to create query
Test