Update intro-to-packaging-example
Updated GitHub URL to fetch a tag version.
A lot of updates due changes in dh_make output, it seems.
Fixed a lot of broken indentation in d/rules examples (lines in Makefiles recipes must start with TAB).
Lintian doesn't warn inform me about testsuite-autopkgtest-missing anymore, don't know why.
The js-beautify command to trick Lintian doesn't work anymore ;) So let's download the real source.