Tags give the ability to mark specific points in history as being important
add support for spectra and images ploting in showscan offline
merge desy patches to taurus 5.1.6
hotfix for #1259 (taurus gui not loading paths)
Bump version: 4.7.4-alpha → 4.7.5-alpha
Bump version: 4.7.2-alpha → 4.7.3-alpha
Bump version: 4.7.1-alpha → 4.7.2-alpha