Move files from examples to dist-files/

The coffeescript makefile is a special case, as it doesn't rely on Duktape.
Fix Makefiles to work from dist root
Fix make_dist script to use dist-files
README fix: refer to Makefile.hello
Release checklist trivia: new dist-files location
Merge branch 'reorg-dist-files'

Reorganize Makefiles and a few other files both in the repo itself and
in the resulting dist package.  This should make it clearer which makefiles
are intended to work from the dist directory only (as opposed to the Duktape
repo itself).
Ditz issue update