Changed the structure of the disassembler to make the disassembling
happen in the individual format file rather than in Disassembler.py.
This allows a more specific disassembling to happen per executable
foramt rather than forcing everything into one format. Also added a
standard data structure for storing information to be passed to the GUI
inside of helpers.py called CommonProgramDisassemblyFormat,
CommonSectionFormation, and CommonInstructionFormat. Also added a
toolbar to the PyDA Interface and added an import button.