Final documentation, testing cleanup

* .gitignore
Added LaTeX temporary files.

+ doc/GIS_Raport_koncowy-MOlszewski_TPieczerak.tex
Final documentation.

* gengraph
Small fix in edge probability.

* testing/graph_example2.gv
* testing/graph_example2.txt
* testing/mst_graph_example2.txt
Example cleanup, to be more clear.

- testing/graph_example4-big.txt
- testing/graph_example5-big.txt
- testing/mst_graph_example4-big.txt
- testing/mst_graph_example5-big.txt
Uneeded.
Images for documentation

* .gitignore
Fix.

+ doc/com_chart.png
+ testing/graph_example1.png
+ testing/graph_example2.png
+ testing/graph_example3.png
Images for final documentation.