Updated adapter interface to use place holders for the where statements in the SQL and pass the value in the execution.
Moved user related parts to a new module called users. Abstracted the ajax javascript and update the login script accordingly.
Modified the core classes to return the content to be rendered to the app class, where it is explicitly returned in the body of the
response. Added a session class to handle session start and session variables. Added an output buffer to the view render method, so
that the html could be returned to the app class and sent in the response body explicitly. Completed the login module.