Entity To SQL

A simple library for building SQL statements by entity class.

Example

Entity definitions:
```c#

[TableMap( Name = "USERS" )]
public class User
{
    [PKeyMap( Name ="ID")]
    public int Id { get; set; }
    [ColumnMap( Name ="FIRST_NAME")]
    public string FirstName { get; set; }
    [ColumnMap( Name = "LAST_NAME" )]
    public string LastName { get; set; }
    [ColumnMap( Name = "AGE" )]
    public int Age { get; set; }
    [ColumnMap( Name = "RoleID" )]
    public Role Role { get; set; }
}
[TableMap( Name = "ROLES" )]
public class Role
{
    [PKeyMap( Name = "ID" )]
    public int Id { get; set; }
    [ColumnMap( Name = "NAME" )]
    public string Name { get; set; }
}

> Usage:
```c#
    var sqlBuilder = new SQLStatementBuilder();
    var select = sqlBuilder.MakeSelect<User>( o => o.FirstName == "Antonio" || o.LastName == "Di Motta" && o.Age == 150 );
    // Result:
    // SELECT t1.ID,t1.FIRST_NAME,t1.LAST_NAME,t1.AGE,t1.RoleID FROM USERS t1
    // WHERE (t1.FIRST_NAME = 'Antonio' OR (t1.LAST_NAME = 'Di Motta' AND t1.AGE = 150 ))
    var join = sqlBuilder.MakeJoin<User,Role>( (u,r) => u.Role.Id == r.Id );
    // Result:
    // SELECT t1.ID,t1.FIRST_NAME,t1.LAST_NAME,t1.AGE,t1.RoleID,t2.ID,t2.NAME FROM USERS t1 INNER JOIN ROLES t2 ON t1.RoleID=t2.ID