add KissAnime extractor
Add current source tree to load path
extractor/common.py fix documentation for method _html_search_regex
make regexes more lenient
Adapt to changes of the div containing the Links

The formulation of the description changed and there is a newline after
the start of opening div-tag. These chages were introduced in calendar
week 2014-46.
bin/youtube-dl: use realpath to resolve symlinks
[archiveorg] most metadata fields are optional

Example: https://archive.org/details/Cops1922