Add features for different identifier types. #37
Add more feature requirements to tests based on newly added features.
Move testing annotations out of structure as they apply elsewhere.
Add the notion of Feature bundles to the test suite.
The addedge feature is now bundled under LoadGraphWith annotation.
Add features to tests.
Add "vertices only" feature set.
Add features requirements to test suite for partitiongraphstrategy.
Add required features to tests in readonlygraphstrategy.
Add required features to tests in strategy.
Add required features to batchgraph tests.
Modify batchgraph tests to use double for wider coverage.
Add required features to EdgeTest.
Add more required features to feature tests.
Add required features to GraphTest.
Add required features to IOTest.
Add required features to PropertyTest.
Add required features to TransactionTest.
Add required features for VerteTest.