Host everything on the device itself, rather than redirecting
to https://micropython.org/webrepl/ because that doesn't work when
there is not internet, including when the device is in Access Point
mode.
This was a bit slow, because of the many files and being pretty large,
but the inline_minify_webrepl.py makes this much better and brings it
down to around 1s to load the page, versus 20 seconds.
The minification also reduces the size from around 160KB to 80KB.
Thomas Farstrike