Refs #8778 First pass, pyexec barely started
Refs #8778 First pass at pyexec
Refs #8778 correct silly sintax error
Refs #8778 Renamed algorithm

To better reflect that this algorithm uses the dsfinterp python package
Refs #8778 Added RegressionWindow and RegressionType properties
Refs #8778 We can now interpolate to more than one value
Refs #8778 Set channelgroup as an instance attribute

In case we want to reuse the algorithm, we can create an unmanaged
algorith and run it many times, but we initialize only
channelgroup once
Refs #8778 Added bool variable to perform local regression
Refs #8778 Add LoadErrors option in algorithm properties
Refs #8778 Added reference to dsfinter in pypi
Refs #8778 Added WIKI header
Refs #8778 Ammended WIKI header
Refs #8778 Added exceptions
Refs #8778 Unit test
Refs #8778 Added a StringArrayValidator

For linear regression types
Refs #8778 Redo WIKI header

..and inserted mandatory validators
Refs #8778 Correct direction of some properties
Refs #8778 Correct typo in WIKI header
Refs #9074. Using new default color map code.
Refs #9074. Adding IDL and Matplotlib color maps.