Version 1.5.0

[sezelt]

• Copy images to the clipboard (scaled and colored!)
• Display error dialogs when datacube saving fails
• Metadata viewer
• Add high tension in Calibration window (currently just stored, but will eventually be used to convert from spacing<->angle)
• Shortcut to open the config file in the OS's file browser
• The FFT window is now the "Result" window and operates with greater flexibility, allowing plugins to take over the window. There is now an interface for plugins to register to receive callbacks when things change and publish data to the result window. It also has proper scaling and limits controls similar to the other panes.