support zsh completion
add zsh completion support into Makefile
Description changed
Merge pull request #3932 from Dineshs91/ndr-fix

Description changed
[niconico] Fix ignored --netrc flag

See issue #3753
release 2014.10.12
[options] Mention login in --username documentation (#3753)
[options] Consistent formatting and general niceness
Merge remote-tracking branch 'xu-cheng/zsh-completion'
[zsh-completion] Ignore generated file (#3890)
[youtube] Download DASH manifest by default (Closes #3887)
[youtube] Add support for format 278