Figures are to be converted to png so that all browsers can read them,
however svg files are be kept to allow futher editions of the figures.

* 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.

    * CMakeLists.txt: build doc by default,
    * doc/package.dox.cmake: headers are now in include directory.

The package name is now dynamic-graph (this still needs to be changed in the git repository). Updated source files to reflect that change. Clarified CMakeLists, explicited cpp source files for libraries.

(dynamicGraph/ -> dynamic-graph/)

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)