Fix algorithm method naming in train-test
Use eval classloader for external algorithm files (#518)
Deprecate preload method for algorithms
Update Grapht (#518)

- Use Grapht 0.9.0-SNAPSHOT
- Use LensKit EvalProject class as base for inferring the default class loader
Infer default class loader in ConfigurationLoader
Use new Grapht class loader utilities in LkREL
Merge pull request #530 from elehack/feature/elehack-518-classloader

Finish class loader fixes