Added dropbox support. issue #2055
Update __init__.py
added dropbox support
[youtube] Download DASH manifest

If given, download and parse the DASH manifest file, in order to get ultra-HQ formats.
Fixes #2166
Added support for Dropbox
Modified dropbox to reflect small changes
Merge remote-tracking branch 'sahutd/master'
[dropbox] PEP8 and simplify (#2171)
[dropbox] Correct test case (#2171)
[myspace] Add support for song urls (fixes #2040)
[myspace] More robust mediatype check
[youtube] Fall back to header if playlist title is not available

Sometimes (in about 10% of requests), the og:title is missing for a weird reason.
See #2170 for an example
Add infrastructure for paged lists

This commit allows to download pages in playlists as needed instead of all at once.
Before this commit,
    youtube-dl http://www.youtube.com/user/ANNnewsCH/videos --playlist-end 2 --skip-download
took quite some time - now it's almost instantaneous.
As an example, the youtube:user extractor has been converted.
Fixes #2175
release 2014.01.20
Correct XML ampersand fixup
Deal with implicitly UTF-16 decoded webpages

These webpages don't specify an encoding and rely on the BOM
[generic] Improve testcase
[extractor/common] Clarify when and when not we generate the filename
[servingsys] Add support

This also adds support for brightcove advertisements.
Fixes #2181
release 2014.01.21