Add "skip" option that allows user to skip UglifyJS execution.
Add Maven file-management library as a plugin dependency.
Represent JavaScript source files as a Maven FileSet that allows user to easily include/exclude different files and directories.
Update documentation. Add an example showing the plugin configuration.
Merge branch 'feature-skip-uglifyjs'
Merge branch 'feature-source-fileset'
Merge branch 'feature-update-documentation'