2. Clear the "Name" field after logging a QSO.
3. Add fil4.f90, a subroutine for downsampling from 48000 Hz to 12000 Hz
sample rate. (Not yet incorporated in WSJT-X, but intended to be called
from arounf line 51 in Detector.cpp.)
4. Minor updates to User's Guide.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3570 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
