Update intensity view widget

Closes #12, #20, and #21

See merge request !64

Adds dependencies to setup.py

Closes #23

See merge request !63

# Conflicts:
#   setup.py

# Conflicts:
#   xsocs/gui/__init__.py

Read calibration and energy from spec

Closes #31 and #35

See merge request !65

Update project files

Closes #22 and #19

See merge request !62

Make sure to use PyQt5

Closes #37

See merge request !61

Add a mask for the QSpace conversion

See merge request !59

Select intensity

See merge request !58

Merge scans

See merge request !54

disabled