data_view replaced with dataview
changed from Qwidget to QMainWindow
Added view_data in separate file
changed color scheme to spectral
Imports, File opening, opening functions

Changed import Pyside to PyQt4 (to work with hyperspy), added file
opening dialog if no file is given to CubeFit, changed canvas parent to
mainframe, added functions to open CubeFit from various programs (still
buggy)
removed wraith import
renamed hdf5_file to hdf5_filename and added variable titles to data
moved view_data to its own file, added wraith/spectrum holder
Pyside to PyQt4
Pyside to PyQt4. Changed input to wraith
Open Qt application if one is already running code
import data_holder