Deprecate DependencyParser.dependencies
Add DependencyParser.{dependencyGraphPostagged, dependencyGraphTokenized} and stub implementations that throw UnsupportedOperationException.
Remove string param from ClearParser.graphFromTree, since it appears to be unused.
Add implementation of dependencyGraphPostagged and dependencyGraphTokenized to ClearParser.
Add implementation of dependencyGraphPostagged and dependencyGraphTokenized to MaltParser.
Add implementation of dependencyGraphPostagged and dependencyGraphTokenized to StanfordParser.
Add abstract postagger to DependencyParser, provide default implementations of dependencyGraph and dependencyGraphTokenized.
Remove dependencyGraph and dependencyGraphTokenized from ClearParser.
Remove dependencies, dependenciesTokenized, dependencyGraph and dependencyGraphTokenized from MaltParser.
Update BaseStanfordParser and StanfordParser for new DependencyParser interface.
Merge pull request #13 from rbart/parser-interface

Add methods dependencyGraphPostagged and dependencyGraphTokenized to DependencyParser