Incorrect conversions for tables with row of different lengths

[EvitanRelta]

Problem 1

Currently, this HTML:

<table>
  <tr>
    <th>Header 1</th>
    <th>Header 2</th>
  </tr>
  <tr>
    <td>Cell 1</td>
  </tr>
</table>

Throws an error:

The output markdown should be in HTML-syntax, the same as the above HTML.

Note: It should NOT be in markdown with missing cells like:

| Header 1 | Header 2 |
| -------- | -------- |
| Cell 1   |

As the above markdown renders as:

Header 1	Header 2
Cell 1

When it's suppose to be:

Header 1	Header 2
Cell 1

Problem 2

Currently, this HTML:

<table>
  <tr>
    <th>Header 1</th>
  </tr>
  <tr>
    <td>Cell 1</td>
    <td>Cell 2</td>
  </tr>
</table>

converts to this markdown:

| Header 1 |
|----------|
| Cell 1   | Cell 2 |

which incorrectly renders in GitHub as:

Header 1
Cell 1

The output markdown should be in HTML-syntax, the same as the above HTML.

Note: It should NOT be in markdown with empty headers:

| Header 1 |        |
| -------- | ------ |
| Cell 1   | Cell 2 |

As the above markdown renders as:

Header 1
Cell 1	Cell 2

When it's suppose to be:

Header 1
Cell 1	Cell 2