New strategy for adding nodes to roadmap.
Playing with path smoothing.
Basic test for halton sequences.
Minor modifications for tests.
Changed end of path behavior of path iterators.

Now they stay at the end point instead of raising StopIteration.
Checking velocity and acceleration values in path test.
Refactoring in local planner test.
Two more paths for testing local planner.
Fixed wrong velocity polynomial in local planner.
Proper detection of finished path iterator.
Good enough basic path finding.