ParticleSystem and Optimize classes should be in shapeworks namespace

[cchriste]

, etc.

[sheryjoe]

@akenmorris @medakk has this been resolved?

[medakk]

No, everything is still in the itk namespace.

[akenmorris]

As we un-ITK these classes we will move them out. For example, the Optimize and Sampler classes are not longer ITK objects and now live in the shapeworks namespace.

For many of these classes, ParticleGradientDescentPositionOptimizer for example, it doesn't make sense to change the namespace without making them non-ITK classes. Otherwise you will have to add the itk namespace to many of the types used.

[akenmorris]

Done.