filterwheel.py -- set initial to current filter, fixed logger errors

The initial filter selected is now set to its current value. Several logging errors fixed.
drivers.py -- filt to filter, global name fixes, run number problem

In InfoFrame, the filter was called filt. Various globals were wrong.
uspec.py -- undef changed to UNDEF
filterwheel.py -- now displays current filter
uspec.py -- incorrect key fixed

access_tcs should have been tcs_on