Fix typo in README.md

Fix broken link in README.md

[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] prepare release jwalker-1.1.0

Update README.md

Increase retry for SteepestDescentTest

Update Javadocs

Refactor Edge class

Rename GreedyBestFirst class to BestFirst and update Javadocs

Add SimpleGraph class

Rename A* class to MinCost

Remove isTarget method from Graph, rename Visits methods, update Javadoc

Add IDA* and Parallel IDA* algorithms

Fix Manhattan heuristic for N-Puzzle

Update Javadoc and description in pom.xml