Electron build details

[Akramhar]

1. electron build needs to run on mac for building macOS target / windows for win/linux
2. currently everything is self contained in the built folder, need to find a solution for creating a user folder (where to save microscope / templates)
3. estabilish a way for handling images properly between component and electron stand-alone

[Akramhar]

point 2 is handled in a issue by itself #5