title: Merge cells in org-mode tables
body: <p>Is it possible to merge cells in Org-mode tables?</p>
  
  <p>Examples of horizontal merging would be something like that:</p>
  
  <pre><code>| Header | Merged header |
  |--------+-------+-------|
  | Text1  | Text2 | Text3 |
  | Text4  | Text5 | Text6 |
  </code></pre>
  
  <p>Example of vertical merging:</p>
  
  <pre><code>| Header1 | Header2 | Header3 |
  |---------+---------+---------|
  | Merged  | Text1   | Text2   |
  | text    |---------+---------|
  | here    | Text3   | Text4   |
  </code></pre>
  
  <p>If that is somehow possible in org-mode? If not, what is the most idiomatic way to simulate merged cells?</p>