Note to GitHub users: This git repository doesn't include all of the auto-load scripts required by the plug-in. The easiest way to get the plug-in including its dependencies is to download the latest ZIP archive.
If you're using Pathogen and want to keep the plug-in up to date using git, you can use the easytags.vim mirror repository by vim-scripts.org which is synchronized with the latest release on Vim Online multiple times a day.