.hyperlink returns empty string instead of link value ?
*Created originally on Bitbucket by Anonymous*
```
#!python
c = worksheet.cell('A378')
print c.value
>>> Link text
c.hyperlink
>>> ''
```
Did not set a hyperlink, trying to get a link from worksheet cell(s) but always returns empty string ''
*Attachments:* [test.xlsx](/uploads/c98f0f4f436e4b29774eb3c4f94b92ee/test.xlsx)[SMA_Modbus-TI-en-18.xlsx](/uploads/d434cc6368e8731f003aea6fab3230fe/SMA_Modbus-TI-en-18.xlsx)[example.xlsx](/uploads/7519c18d9ad7611c7af4b675e7d4cb20/example.xlsx)[test-link.xlsx](/uploads/c2c8f46133a1bb8926c23e099c8c953d/test-link.xlsx)
issue