pyqt was way overkill, removed all that and found a far simpler solution.
Don't code late at night :)

Some other small refactorings while at it.
Merge branch 'master' of https://github.com/dgorissen/coursera-dl

Conflicts:
	README.md
cosmetics
- wrap a 401 http error
- add a --reverse-sections flag
bump version
- put version number in separate file
- output cosmetics
fixing issue #31 (broken version import)
Ignore source vids

The source video's can be huge, (e.g. healthinformatics-001), and the same video is available compressed.
Update courseradownloader.py
merged pullrequest by @rnys (skip raw source vids) + cleaned it up a bit.
Added -n CL option to exclude files from downloading, based on filename extension.
small cleanups after merge of pull request #36 by @ckotso. Small doc
improvements and replaced os.path. by path.
fixed issue #33 (replace : by - in the duration of the class as in the
class name)
fixed crash due to code that was changed with pyqt commit but not
reverted back
bump version
typo
improved version handling following advice from
http://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package
help text improvement
fixed subtle and nasty bug, className must be explicitly sanitised and
assigned to prevent hash mismatches later on.
bump version