formatting cleanups
cleanup handling of None tests
cleanup type handling
gl organization cleanups
cleanup gamma organization
cleanup imports
derpacate the getMsPerFrame function in favor of the corresponding visual.Window method
BF: 'semi' mode doesn't crash out now

Fixed check for photometer and commented out old-school GammaLumValsDlg
until it can get better reformed.
BF: 'semi' mode doesn't crash out now

Fixed check for photometer and commented out old-school GammaLumValsDlg
until it can get better reformed.
Merge pull request #379 from toddrjen/visualsplit

Cleanup window.py
Merge pull request #380 from flipphillips/master

Fixed small bug re 'semi' calibration mode.