Add option to preserve scientific notation?

[kkew3]

Similar to https://github.com/jakob/TableTool/issues/73, TableTool tries to convert scientific notation to decimal with many many leading zero's. For example, 1e-22 becomes 0.0000000000000000000001. It would be of great help if it can be set so that it won't make any assumption on the input data, and preserve literally what user inputs. Thanks

[fulldecent]

Thank you. I consider this current behavior to be broken.