* Adding model.eval() calls to prediction functions in table reader
* Add unit test to check if model is set in train mode that inference time prediction still works.
* Add table = table.astype(str) to make sure cells are converted into to strings to be compatible witht the TableReader
* Turn more strings into ints
* Make sure answer text is always a string.
* Refactor table reader to use util functions to reduce code duplication.
* Expanding the tests for the table reader
* Adding types
* Updating tests to work for RCIReader
* Fix bug in RCIReader. Saving the wrong queries list.
* Update _flatten_inputs to not change input variable
* Remove duplicate code
