Remove master branch from Views Infinite Scroll

Per http://drupal.org/empty-git-master, modules should not have a "master" branch. Default branch should be set to the most recent version.

I know this may seem like a nitpicky request, but it was a bit frustrating to checkout the default branch without noticing the module isn't following the standard until after I already made code changes. Removing or at least renaming the master branch will help contributors.