* JpegMain: Main method - to create main jframe and add main panel
* MainLayout: File browswer method with GUI
* Compressor: get the file directory from MainLayout and execute
compression
* MatrixViewerLayout: Matrix Viewer panel to see the change of matrix
vaues
* EightByEightLayout: I cannot add all the matrix values in one screen
because it over exceed the size. Intead, I made 64x64 buttons on
MatrixViewerLayout and if user click the button on MatrixViewerLayout,
it opens the EightByEightLayout to see the change of 8x8 matrix values.