add metadata and imbalanced datasets

codemeta.json

data/imbalanced_datasets/ecoli-0_vs_1/ecoli-0_vs_1-names.txt

data/imbalanced_datasets/ecoli-0_vs_1/ecoli-0_vs_1.dat

data/imbalanced_datasets/ecoli1/ecoli1-names.txt

data/imbalanced_datasets/ecoli1/ecoli1.dat

data/imbalanced_datasets/ecoli2/ecoli2-names.txt

data/imbalanced_datasets/ecoli2/ecoli2.dat

data/imbalanced_datasets/ecoli3/ecoli3-names.txt

data/imbalanced_datasets/ecoli3/ecoli3.dat

...s/glass-0-1-2-3_vs_4-5-6/glass-0-1-2-3_vs_4-5-6-names.txt

...atasets/glass-0-1-2-3_vs_4-5-6/glass-0-1-2-3_vs_4-5-6.dat

data/imbalanced_datasets/glass0/glass0-names.txt

data/imbalanced_datasets/glass0/glass0.dat

data/imbalanced_datasets/glass1/glass1-names.txt

data/imbalanced_datasets/glass1/glass1.dat

data/imbalanced_datasets/glass6/glass6-names.txt

data/imbalanced_datasets/glass6/glass6.dat

data/imbalanced_datasets/haberman/haberman-names.txt

data/imbalanced_datasets/haberman/haberman.dat

data/imbalanced_datasets/iris0/iris0-names.txt