GeniusLyrics: update to parse latest HTML of returned lyrics,

devolving the removal of various crud to `HtmlLyricsProvider`;
  log initial query and use new `StartsOrEndsMatch()` static to
  match JSON replies, log each request, and break if full match;
  `StartsOrEndsMatch()` ignores some common punctuation variations
   & normalizes single quotes and allows match at beginning or end
HtmlLyricsProvider: fix `multiple` mode not to terminate on first
  batch, and defer processing till have whole HTML (avoids issues
  with tags spanning batches);
  add param to take list of regular expressions to remove from HTML
  prior to general processing (used only by `GeniusLyrics` for now)
README.md etc: update list of lyrics providers supported

src/lyrics/geniuslyricsprovider.h

@@ -79,6 +79,9 @@ class GeniusLyricsProvider : public JsonLyricsProvider {
   void HandleSearchReply(QNetworkReply *reply, const int id);
   void HandleLyricReply(QNetworkReply *reply, const int search_id, const QUrl &url);
 
+ private:
+  static bool StartsOrEndsMatch(QString s, QString t);
+
  private:
   OAuthenticator *oauth_;
   mutable QMutex mutex_access_token_;