Move to far more complete .gitignore from GH's repo.
Move to far more complete .gitignore from GH's repo.

html5lib/html5lib-python,alex/html5lib-python,mgilson/html5lib-python,mgilson/html5lib-python,mgilson/html5lib-python,html5lib/html5lib-python,ordbogen/html5lib-python,mindw/html5lib-python,ordbogen/html5lib-python,alex/html5lib-python,mindw/html5lib-python,dstufft/html5lib-python,html5lib/html5lib-python,dstufft/html5lib-python,alex/html5lib-python,mindw/html5lib-python,ordbogen/html5lib-python,dstufft/html5lib-python