There has been a lot of renaming and restructuring in babel, so we need
to modify our code to handle the latest version. We also need to adjust
the way we build our babel worker as babel itself no longer runs in older
browsers such as Internet Explorer.
This control flow is difficult enough as it is to follow. Move the
handling of the untransformed files to a separate block to make it
slightly easier to understand.
Previously launch.sh would check both for the existence of a local
websockify file and /websockify/run file.
This initial check should really be for a local websockify directory
as in packaged environments a file could very well be the actual
executable leading to launch.sh incorrectly attempting to use a local
version of websockify.
