Clean the codes.  Refs #7001.
Add some debug output workspace.  Refs #7001.
Checkpointing work.  Refs #7001.
Checkpointing work.  Refs #7001.
Make some change with FindPeaks.  Refs #7001.
Improve fitting.  Refs #7001.
Improve FindPeaks.  Refs #7001.
Corrected a major error.  Refs #7001.

The algorithm to handle FitWindows were based on a wrong definition.
The code is corrected such that FitWindows specify the range data to fit
a peak.
Fixed a bug.  Refs #7001.
Improved consistency between 2 algorithms.  Refs #7001.
Ignore super wide peaks.  Refs #7001.
Added specific support for flat background.  Refs #7001.
Add property minimum peak height.  Refs #7001.
Tried to resolve a potential conflict in header.  Refs #7001.
Cleared all the debugging codes.  Refs #7001.
Removed some debugging codes.  Refs #7001.
Changed unit test value. Refs #7001.

Changed unit test value as new FindPeaks gives out better result.
Removed optional output property 'OutputWorkspace'.  Refs #7001.
Fixed unit test for FindPeaks.  Refs #7001.
Cleaned the doxygen.  Refs #7001.