I failed to find a satisfactory way to compile and import moo.js with
fixed specifiers, so finally I just gave up and patched the distributed
code to be an es6 module. A bit ugly but it works.
Add the civet and typescript compilers, implement a build step,
provide examples of using from es6, script, and command line.
Of course, there is no actual behavior produced; convert always produces
'foo' at the moment.
