Add test program fersum; several tweaks to fer65.
Code cleanup in lorentzian, and return chisqr in a(5).
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6567 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
1. Measure Doppler width by fitting a (modified) Lorentzian.
2. Don't call "slope" in sync65().
3. New definition of "sync1".
4. Get snr from sync1.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6536 ab8295b8-cf94-4d9e-aec4-7959e3be5d79