Update installation instructions for MATLAB

- Point at the bfmatlab.zip bundle available from the downloads page
Improve readability of alternative script hyperlink
Separate the download link from the artifact names
Adding version checker error issue help
Merge pull request #755 from sbesson/rebased/develop/matlab_downloads

Fix MATLAB installation section in the documentation (rebased onto develop)
Merge pull request #758 from hflynn/rebased/develop/upgrade

Adding version checker error issue help (rebased onto develop)