Update windows docs with ssh installation.
Enable bias mode for the ProEM.
Fix incorrect gain string query. Fixes #19.
Save CCD-EMGN fits header key for recording EM gain. Fixes #14.
Save CCD-SCUT fits header key for recording ProEM exposure shortcut.
Save CCD-SHFT fits header key for recording vertical shift times.
Save TRG-ALGN fits header key for recording trigger alignment.
Move CCD-TIME header next to other time keys.
Fix UTC-LOCK recording T independent of actual GPS lock status.