New build: (d76cd8a) (9e51f0b)

Linux instructions:
    save (rename folder), clone, build.  (see first post)

Windows binary: cgminer-4.11.1-windows-gekko-9e51f0b.7z
    sha1sum: eb928ef8c878e7aef778520a8566279ce46e2847  cgminer.exe

Improve noboost performance.
  + sends work faster
  
Improved peak detection, slightly faster ramp up.
  + use different 1m hashrate formula.
  + allow startup ramp to go up to 550MHz then check hash percentage beyond that.
  + keeps peak and attempted frequency values closer together at higher frequencies, gentler plateau entry.
  
Other tuning / bug fixes
  + fix buffer overrun in frequency info log statement.
  + slow down baudrate on WIN environment, to mitigate AB-4 work frame split.

@9e51f0b
  + give out-of-sync chips a chance to converge at current frequency.