Change macfusion to maintained fork

[mpathy]

The only properly working macfusion is in this repository:
https://github.com/ElDeveloper/macfusion2

mgorbach abadoned the project quite a while ago, this here:
mgorbach/macfusion2#36
..is only one of countless bugs, issues and so on - using the version from the other repo all problems are gone.

Please switch to this repo, so I can get back on the brew package management also with this software..

The oxfuse and macfusion packages also should be coordinated in general, I had 1,2 incompability bugs in the past.

Its Version 2.1 here, while the not working one in the cask repo is 2.0.4

[adidalal]

Looks reasonable to me. Abandoned software helps no one.

Feel free to take a crack at a PR. We're here to help if you have questions!

CONTRIBUTING