Simplify code structure for C++ analysis tools

Simplify code structure for C++ analysis tools

Move all the code for declaring the actual analysis tool into the source
file, and leave only a stub info object in the headers.  Make the class
declared in the header provide a static factory method to allow this.

This has several benefits:
 - Easier to write and maintain the tools, as all the logic is in one
   file only.
 - Clearer about the intended level of encapsulation of the tools.
 - Makes the tools in the library more closely resemble those written
   using the template.  The only difference now is that the main()
   method is replaced by the info object, and that the info object
   provides the names to pass to TrajectoryAnalysisModule constructor.

Change-Id: Ib545cc1d8900fe88cb58811df2cd4a63a6a99b2f