initial commit - experimenting with extracting graph operations to a Graph class
got Graph interface and Graphs class with dfs working, nominally
deleted ghost files
Zork working with Graph and Graphs in same file. will split out next.
Graph, Graphs files, Zork test working. added Test. next add bfs
added bfs, graphviz output. dfs and bfs working. next move Graphs methods into Graph interface
moved Graphs methods to Graph interface ala Java 8
deleted Graphs.java
add test/GraphTest.java - does nothing yet
minor update
Merge remote-tracking branch 'tate/master'
merging
merging more