Revert "browserify is installed globally."

This reverts commit 812699cdae1c39d94f949e725fcc1fedc68e4444.
Revert "Some foolery to use browserify on the client-side JavaScript."

This reverts commit 56bd94fbf7a39c68acaf2b0c6d39f72efe0c57c3.
Revert "Also: grunt-browserify and grunt-contrib-clean."

This reverts commit a176c8babf2a11dd0ec878f609d4810ccc82710e.
Revert "We're going to need browserify...."

This reverts commit f28aca799eda6e8118c67f78e39c59e4d602b472.