Overview Doxygen pages for analysis framework.

Overview Doxygen pages for analysis framework.

Main content:
- General overview page for the whole framework.
- Reorganized the way the documentation for the analysis template is
  generated.
- Separate page for describing the concepts for the analysisdata module
  in more detail.
- Separate page for giving an overview of the selection engine.
  Also minor clean up for related documentation pages.
- Add missing installation rule for analysisdata/modules/lifetime.h.

The module pages could now use some restructuring to reference the
information here and provide relevant details instead of duplicating any
of it.  Left for later.

Change-Id: I159a2d913fe6f9114c60804d30fa3714b23df262