Include ipython notebook dependencies in OS X bundle.

[quantumsteve]

This fixes #11482

A user complained that the 10.9 package isn't allowing him to use the ipython notebook. We've tracked this down to a packaging fault. This pull request should fix this issue and make it more difficult for them to occur in the future.

Our current bundle should not require setting the DYLD_LIBRARY_PATH environment variable as described on the wiki. That being said, it also shouldn't hurt anything and I'm hesitant to update the documentation until after release 3.4.

Testing

• Try generating an OS X bundle after uninstalling one of the python libraries.Verify that the packaging step exits with a fatal error.
• Build an OS X bundle and install it. Verify that ipython notebook is functioning.

[OwenArnold]

@quantumsteve I can start the IPython Notebook, however I would not be able to use this with Mantid. If I modify the DYLD_LIBRARY_PATH as per our existing instructions, I get this:

We need to be able to load the plugins and core mantid libraries so that we can use them with the notebook, but clearly dragging in the libJPeg is a mistake in this case.

[quantumsteve]

@OwenArnold If you unset your DYLD_LIBRARY_PATH, can you then load the Mantid libraries?

hdf4 depends on libjpeg, which is installed by homebrew. Setting your DYLD_LIBRARY_PATH causes some system libraries to find this libjpeg instead of the system library.

[OwenArnold]

@quantumsteve. Yes it does work now without any need to modify the library paths. Could you please update the wiki documentation so that there is a 10.9+ section (or do it by Mantid version) in the OSX heading. We can remove the current instructions for OSX when the release is out.