Improve error message when loading omnistat modules

[jordap]

The check before loading omnistat modules with the try/except block is no longer necessary, and generally leads to confusing error messages.

For example, if one of the dependencies is missing, the current approach will only show the error message saying the omnistat module couldn't be loaded and asking to verify installation. After removing this check, Python will just fail to import the missing module, making it easier to understand what's going on.

[koomie]

The problem is that for some folks, the resulting error message from an import failure will be even more confusing and 99% of the time we know that the failure is due to a lack of pre-installing the dependencies. If you want to adjust this, I would prefer that we keep the try/catch approach, but amend to catch the exception error string and show that after the current error (or expanded current error that suggest to double check dependencies have been installed).

[jordap]

OK, I see what you mean. I find the current message really confusing, and I'd rather see the standard Python error.
But I understand that may not be ideal for everyone.
I'll try to change it and show both.

[koomie]

OK, I see what you mean. I find the current message really confusing, and I'd rather see the standard Python error. But I understand that may not be ideal for everyone. I'll try to change it and show both.

Thanks, I think that will be good compromise for basic users and developer types...

[jordap]

I changed it so it shows the following message:

Unable to load Omnistat: No module named 'examplemodule'
Please verify installation and dependencies.

This way it shows the exact module that Python is failing to find, and we still keep the nicer error message.