Support Leica lens information

[GoogleCodeExporter]

**NOTE** PLEASE PROVIDE A SAMPLE IMAGE THAT REPRODUCES THE PROBLEM. In
order to ensure problems stay fixed, unit tests are generally added.
Please provide an image that demonstrates the issue you are reporting.
Furthermore, please indicate that you are happy to have this image included
in the test data suite.  Do not upload copyright images, though you may
email the developers privately if needed.  Thank you.

What steps will reproduce the problem?
1.used Leica lens photo
2.read lens tag
3. cant get any info

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?

Please provide any additional information below.

Will u support the lens system info?  I want use it to read all kinds of lens's 
photos. 

Original issue reported on code.google.com by fen...@126.com on 12 Jun 2012 at 3:44

[GoogleCodeExporter]

Please attach a sample image to this issue that includes the lens info you are 
referring to.

Original comment by drewnoakes on 12 Jun 2012 at 8:57

• Changed title: Support Leica lens information

[GoogleCodeExporter]

I cannot do anything about this issue without a sample image. If you're able to 
provide one, I will reopen this issue.

Original comment by drewnoakes on 16 Oct 2012 at 2:23

• Changed state: Invalid
• Added labels: Priority-Low, Type-Enhancement
• Removed labels: Priority-Medium, Type-Defect