MC1 column had 8 rows with a value of 1. It didn't make sense given the next highest value was 0.47 . Assuming they were data errors, they were removed

truthfulqa data added to dataframe

Added test for removal of undesired columns. fixed code error in column removal

Added initial tests. test_columns and test_rows will be updated or removed later as they test for the exact number of columns and rows. the number of rows will change as more models are added