tests for connective components search
find connective components function
add keynodes for oriented and not oriented graph and edge
add tests for not oriented modifications and fix for connective components search
add edge keynode
add modifications for not oriented graph
connective components search fixed
remove find_conn_comp files
Merge pull request #4 from KiselN/find-conn-comp

Add support of non-oriented graphs and connective components search
small code refactoring