Add bs=1024 quora results

Add similarity_evaluation_sts-test_results.csv

Delete eval/SGPT-5.8B-weightedmean-nli-bitfit_weightedmean_layer-1_results_average_precision.json

Add eval results (1/3)

Improved model trained with larger batch size

Add SGPT-6.1B-weightedmean-nli-bitfit