Changed some variables to static to access from another class;
Created getters for hexFormatting and wrapping booleans in BitmapFrame;
Created getter for thresholdSlider value;
Removed several components from MultiFileConvertDialog;
Added JTextArea to MultiFileConvertDialog;
Added methods for determining if file is image and processing selected
files into array for processing;
Added code to process & output images to JTextArea;