Simplified preferredencoding()

Not sure what is the point to use yield to return encoding, thus
it will simplify the whole function.

Signed-off-by: Arvydas Sidorenko <asido4@gmail.com>
Added options to set download buffer size and disable automatic buffer resizing.
Updated --no-resize-buffer docs, removed -b option
Add arte.tv Info Extractor
Make youtube-dl
Fix mandoc nits
adding test for vimeo, xvideo and soundcloud
adding stanford open class courses
adding collegehumor test
adding xnxx test
skipping vimeo for the moment
adding second vimeo url
Reworked Vimeo file selection logic (quality, codec) - closes #530
release 2012.11.17
Also enable album URLs on Vimeo.
aliased --literal to --title
alias %(title)s to %(stitle)s
Merge pull request #545 from FiloSottile/alias

Kill (alias) --literal and %(title)
Merge pull request #538 from zejn/patch-1

Also enable album URLs on Vimeo.
Add some parentheses around print for #180