dependency list. "make dist" requires wheel pkg.

temp dir filename contains special characters. previously filename is not
properly escaped when delete using shell command rd/remove-dir.

- update README.rst;
- update lib versions in requirements.txt;

get_local_file_for_url() should compare path_line with tempdir, url will never
match tempdir.

project is made public on gitlab, these config files comes from python project
template, are not used in this project.

when rewrite path in m3u8 file, do not rewrite if path has already been
rewritten before.

This is a minor change, it only fix things when process is killed when .m3u8
file is downloaded but not rewritten yet.

also ensure it is valid for linux.

- bugfix: on windows use rd command instead of rm command.
- bugfix: do not rewrite m3u8 file (again) if local file is reused.
- minor, adjust some log message level.

it needs the m3u8 media playlist url in order to do proper rewriting.

previously absolute path may not be replaced with relative path if there is no
http or query param.

include utils/versionutils.py and requirements.txt in MANIFEST.in

use action=version for --version support, this allow me to make -o and
URL required params.

this allow user to config download worker poolsize.

honor $XDG_CACHE_HOME,
uses %LOCALAPPDATA% on windows.

support relative link in fragment url

also changed ffmpeg log level to warning.