Pretrained model implementation and more

[jm-glowienke]

• Assimilated use of gleif-base use in Eiopa and GLEIF rdf dataset
• enabled to use several folders at once to test templates in Generator
• Counting of test files in scripts is changed to model_input folder
• new test sets with same questions and only using different entity objects --> compare performance on names
• Fixed use of replace-unk
• Removed iwslt dictionary

Closes #51 Closes #49