Add bin .classpath .project to gitignore
Graph builder should return graph
Graph builder should return graph
Add test helper to build graph
Add simple distance calculator and spec for it
Graph algorithm abstract class
Add routes finder and routes constraint
Add route finder by constraint so that we can apply different constraint
Add routes finder by distance max, stops count, stops max and specs for them
Add some helper methods in graph helper class
Add route not found exception in case we can not find a route
Ignore xtend-gen