Many changes, new scripts, fixes, tests etc.

+ .gitignore
Added .gitignore for binary files (pdf, png).

* Makefile
* main.c
Small code fixes.

* GIS_Sprawozdanie_2-MOlszewski_TPieczerak.tex
Documentation update. Moved to doc/.

+ gengraph
Perl script for generating graphs.

+ mstgraph2gv
Shell script visualising graph using graphviz library.

* graph_example.txt
* mst_graph_example.txt
Moved to testing/.

+ testing/graph_example1.gv
+ testing/graph_example2.gv
+ testing/graph_example2.txt
+ testing/graph_example3.gv
+ testing/graph_example3.txt
+ testing/graph_example4-big.txt
+ testing/graph_example5-big.txt
+ testing/mst_graph_example2.txt
+ testing/mst_graph_example3.txt
+ testing/mst_graph_example4-big.txt
+ testing/mst_graph_example5-big.txt
A lot of new test cases.