Various changes

• Added $options as the second parameter to MySQL::__construct to specify global behavior
• Added the ability to set user defined factories for the SIUD-Query-Builders
• Added $options-Parameter 'select-options' > 'preserve-types-default'
• Added $options-Parameter 'select-options' > 'fetch-object-class-default' for fetchObject*
• Look at the README.md/initialization for more information