Remove the Auto Zero button and associated code.

Other code cleanup.
Display UTC at start of sequence on decoded text line.
Install DLLs to {app} rather than {sys}.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2788 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

plotter.h

@@ -58,7 +58,6 @@ public:
   void setFcal(int n);
   void DrawOverlay();
   int  fQSO();
-  int  autoZero();
   void setPalette(QString palette);
   void setFsample(int n);
   void setNsps(int ntrperiod, int nsps);
@@ -102,9 +101,6 @@ private:
   bool    m_dataFromDisk;
   char    m_sutc[5];
   qint32  m_line;
-  qint32  m_hist1[256];
-  qint32  m_z1;
-  qint32  m_z2;
   qint32  m_fSample;
   qint32  m_i0;
   qint32  m_xClick;