Add basic io to read and write graph

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Fix memory leak

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
io: Return also number of verticles

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Add kosaraju algorithm implementation

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Add some sample graph for testing

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Add implementation of our algorithm to find WCC

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Use fully working algorithm instead of kosoraju part only

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Add another sample graph for testing

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Add makefile for project build

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>
Move sample graphs to separate directory

Signed-off-by: Krzysztof Opasiak <ups100@tlen.pl>