Preparation or improvement of the guide for examination of the implemented dynamic systems (issue #872 related)

[bogumilchilinski]

The goal is to prepare or improve a guide or report that is generated by the following code:

from dynpy.utilities.documents.document import DynSysOverviewReport
DynSysOverviewReport();

[bogumilchilinski]

Components of the guide have been improved.

The code was checked with the following call:

from dynpy.utilities.documents.document import DynSysOverviewReport
DynSysOverviewReport();