TODO: Homogeneous relationship between debugging information.
Giving more python examples.

* Moved entity.png to doc/figures so that it can be found by doxygen (cannot use the svg version because it breaks the layout in my browser - Chrome).
* Corrected some doxygen errors.

Type in symbol dgDEBUGFLOW resulted in not being able to load shared libraries. Fixed. Preliminary documentation changes. Re-added INSTALL file.

Configured dynamicGraph package and cmake files. Last-minute adjustment to code for SOT separation (SOT Break)