support option to remove space line between each data row

[zvier]

When we use gotabulate 'Simple Table' in our container image build project isula-build to list images managerd by the daemon, the space line between each item is too sparse. This lead to a full screen page list fewer items as follows:

isula-build ctr-img images
----------------------------------------------  -----------  -----------------  ------------------------  ------------
 REPOSITORY                                      TAG          IMAGE ID           CREATED                   SIZE
----------------------------------------------  -----------  -----------------  ------------------------  ------------
 <none>                                          <none>       23e3d8bb12ff       2020-11-24 08:11:15       1.45 MB

 lzk                                             latest       f19434180a1c       2020-11-18 10:54:24       1.44 MB

 <none>                                          <none>       b6b74a847ff3       2020-11-18 10:54:19       1.44 MB
----------------------------------------------  -----------  -----------------  ------------------------  ------------

If there exist an option which can control remove those space line, more items can be display and I think also useful in other scenarios. The result in our project can be:

isula-build ctr-img images
----------------------------------------------  -----------  -----------------  ------------------------  ------------
 REPOSITORY                                      TAG          IMAGE ID           CREATED                   SIZE
----------------------------------------------  -----------  -----------------  ------------------------  ------------
 <none>                                          <none>       23e3d8bb12ff       2020-11-24 08:11:15       1.45 MB
 lzk                                             latest       f19434180a1c       2020-11-18 10:54:24       1.44 MB
 <none>                                          <none>       b6b74a847ff3       2020-11-18 10:54:19       1.44 MB
----------------------------------------------  -----------  -----------------  ------------------------  ------------

or

isula-build ctr-img images
+----------------------------------------------+-----------+-----------------+------------------------+------------+
| REPOSITORY                                   | TAG       | IMAGE ID        | CREATED                | SIZE       |
+==============================================+===========+=================+========================+============+
| <none>                                       | <none>    | 23e3d8bb12ff    | 2020-11-24 08:11:15    | 1.45 MB    |
| <none>                                       | <none>    | 71173ee82707    | 2020-11-24 08:09:43    | 1.44 MB    |
| <none>                                       | <none>    | 5d5db30060ff    | 2020-11-24 08:05:46    | 1.44 MB    |
| <none>                                       | <none>    | bde817fd2249    | 2020-11-20 11:56:34    | 1.44 MB    |
| <none>                                       | <none>    | 034e08b6cade    | 2020-11-20 11:53:06    | 1.44 MB    |
| lzk                                          | latest    | f19434180a1c    | 2020-11-18 10:54:24    | 1.44 MB    |
| <none>                                       | <none>    | b6b74a847ff3    | 2020-11-18 10:54:19    | 1.44 MB    |
| <none>                                       | <none>    | 174ad5b1cf49    | 2020-11-16 10:06:29    | 1.44 MB    |
| <none>                                       | <none>    | f28a219985c1    | 2020-11-16 08:20:17    | 1.44 MB    |
+----------------------------------------------+-----------+-----------------+------------------------+------------+

For above use it looks more reasonable. In the end, thanks for this project.