gui: Pylint cleanup
Value rounding fix (wip)
Merge branch 'small_upgrades'
acq: add CameraCountStream

simple stream that just count (mean) the intensity of the pixels over time.

Will be used by the SPARC GUI
acq stream: put back code for handling no drift period in SEMCCDMDStream

apparently got eaten by a merge of Kimon's code
Si float value formatting (wip)
Merge branch 'master' of delmic-server.local:odemis
Merge branch 'small_upgrades'
Merge branch 'master' of vpn.delmic.com:odemis
gui sparc: add count over time graph for spectrometer

As requested from user feedback in order to allow alignment of the optic fiber to the spectrometer.

For now it BREAKS the only SPARC system we have: the Andor SR303i doesn't allow changing the center wavelength
while acquiring spectrums. As now the spectrometer is constantly acquiring, it's impossible to change the
center wavelength.