[soundgasm] Extract title from webpage

[MikeLund]

• I've verified and I assure that I'm running youtube-dl 2017.10.20
• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

Verbose output

$ youtube-dl https://soundgasm.net/u/kinkyshibby/F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill --get-filename --dump-json -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://soundgasm.net/u/kinkyshibby/F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill', u'--get-filename', u'--dump-json', u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.10.20
[debug] Python version 2.7.10 - Darwin-17.0.0-x86_64-i386-64bit
[debug] exe versions: avconv 12.2, avprobe 12.2, ffmpeg 3.4, ffprobe 3.4, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: unable to extract description; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[debug] Default format spec: bestvideo+bestaudio/best
kinkyshibby_F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill-83689bf6b1a664b3b4176a24481151eae47bcd37.m4a
{"display_id": "F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill", "extractor": "soundgasm", "protocol": "https", "description": null, "format": "0 - unknown", "requested_subtitles": null, "format_id": "0", "playlist_index": null, "playlist": null, "title": "kinkyshibby_F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill", "url": "https://soundgasm.net/sounds/83689bf6b1a664b3b4176a24481151eae47bcd37.m4a", "extractor_key": "Soundgasm", "http_headers": {"Accept-Language": "en-us,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20150101 Firefox/47.0 (Chrome)", "Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7", "Cookie": "soundgasm_session=tZ9KiqqlMxzOh5NxN9Kg38ElJB7CkQc6VGED4gJMaoo8c53lIWlUjJIRh2UvRCZzuUIYuU9VBueyLw137VNo2RcYoX2ClkKUjU84gJKYZ8TIwctl4TZUPMNWXAr8PKbGL3smmE72p9dSl4pppr070jR4RtHcidqQnx5vWA5g964l9OLC501A56kkgFYgyRGOEBGkOPlfMkTQGubZfQqLPTDVM5mL899v8%2BZR%2F7ASEEMhk1rR60UxyZQ9QbZY%2BXFESrVycGyRtCtkKaZaWTjJUNGvHPWC7G3XT7JmbUp4%2F%2BVeJsh3xjz8V8Mm%2BPm%2BJndFkZztWbHdBRgJTjLB3I3KuV37rAWxyszT4BqEUhrMMTz1e23CTHKSU9tIpnT3Iq0Wg8rHgvx7eOHQwo%2FEtCX3wuhXvH8qegwQVC6U0o%2FvxEo%3D560c438acbee8f5e9384ac91e335292cf5c1f0c9; csrf_cookie_name=9146fbc3b15e2923a9cbc66a49f89132"}, "id": "83689bf6b1a664b3b4176a24481151eae47bcd37", "ext": "m4a", "webpage_url": "https://soundgasm.net/u/kinkyshibby/F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill", "_filename": "kinkyshibby_F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill-83689bf6b1a664b3b4176a24481151eae47bcd37.m4a", "fulltitle": "kinkyshibby_F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill", "webpage_url_basename": "F4M-Shrinking-for-Goddess-GiantessShrinkingHFOHypnosisBody-worshipFemdomBlowjobTeaseLapdancecunnilingusAbsorb-fetishScript-fill"}