Adds function to retrieve query string from url
Adds function to retrieve `REQUEST_METHOD`
Adds functions to check for HTTP/HTTPS & makes `isCLI` public
Refactors function to get domain name
Adds functions to retrieve root url (without query string) and path
Shifts taint checking classes to separate file; Refs #6
Refs #6;

*   Makes `isCLI()` protected
*   Adds `ServerIP()` to retrieve IP of server
Removed Trash directory, Created Directory for SQL