lyrics fetcher: add support for tekstowo.pl

NEWS

@@ -5,6 +5,7 @@ ncmpcpp-0.8 (????-??-??)
 * Require C++14 compatible compiler during compilation.
 * Lyrics from files containing DOS line endings now load properly on Linux.
 * Added support for fetching lyrics from genius.com.
+* Added support for fetching lyrics from tekstowo.pl.
 
 ncmpcpp-0.7.7 (2016-10-31)
 * Fixed compilation on 32bit platforms.

src/lyrics_fetcher.cpp

@@ -45,6 +45,7 @@ LyricsFetcher *lyricsPlugins[] =
 	new LyricsmaniaFetcher(),
 	new MetrolyricsFetcher(),
 	new JustSomeLyricsFetcher(),
+	new TekstowoLyricsFetcher(),
 	new InternetLyricsFetcher(),
 	0
 };

src/lyrics_fetcher.h

@@ -124,6 +124,14 @@ protected:
 	virtual const char *regex() const override { return "<lyrics.*?>(.*?)</lyrics>"; }
 };
 
+struct TekstowoLyricsFetcher : public GoogleLyricsFetcher
+{
+	virtual const char *name() const override { return "tekstowo.pl"; }
+
+protected:
+	virtual const char *regex() const override { return "<div class=\"song-text\">.*?</h2>(.*?)<a"; }
+};
+
 struct InternetLyricsFetcher : public GoogleLyricsFetcher
 {
 	virtual const char *name() const override { return "the Internet"; }