Add vertex isolate testing for DegreeOf()
Move DirectedGraphSuite over to builder system
Move SimpleGraphSuite over to builder system
Move MutableGraphSuite over to builder system
Move WeightedGraphSuite over to builder system
Move MutableWeightedGraphSuite over to builder system
Move LabeledGraph suites over to builder system
Move PropertyGraph suites over to builder system
Finish moving everything relevant into NG test suite
Reorganize graph suite testing files.

(Remove the old one completely, woot)
Merge branch 'builder'
add fml
Start using gocheck fork in dfs
Forgot to s/GraphSuiteNG/GraphSuite/
s/EachAdjacent/EachAdjacentTo/g
Add a SuiteLabel to all the graph suites.
Update travis with my gocheck fork
Remove type-specific edge enumerators. Closes #10.

It's far more idiomatic Go to just expect calling code to type assert as
needed.
Use floats instad of ints for Weighted. Closes #7.
Remove hack that initializes maps in ensureVertex.