optimizes client resources

Removed some ununsed libs, cleaned up the build. Auth0-lock still needs
to be packaged seperatlly since its i18n component seems to break the
build. Added copytask to copy over mapbox images to dist. We should also
copy fonts to dist which would mean we wouldn't need to package the
bower_components filter which is huge and only slows down the build and
deployement process. Packaging the whole bower folder might also pose
some security concerns.