2.4.0 Release

12/19/2014 - Afffsdd made the Bytecode Viewer directory hidden.
12/19/2014 - Added save Java file as, for singular class file
decompilation (this is threaded).
12/19/2014 - Removed unused Bytecode Decompiler debug code.
12/20/2014 - Made a new outdated pane - http://i.imgur.com/xMxkwJ9.png
12/20/2014 - Added an expand/collapse the packages in the file
navigator.
12/20/2014 - Moved all of the settings to
the.bytecode.club.bytecodeviewer.Settings
12/20/2014 - If the class file does not start with CAFEBABE it won't be
processed.
12/20/2014 - Properly handled file not found error.
12/21/2014 - Fixed the Refresh Class causing a dupe.