refactor scrape_lyrics_from_url into smaller functions
add _scrape_merge_paragraphs lyrics scraping step + others scraping enh
sort sources in alphabetical order

remove test_sources_fail() (all sources pass now)
add lyrics rsrc files
no html entities in _scrape_streamline_soup output
merge strip_cruft() and _scrape_normalize_eol() into _scrape_strip_cruft
use beautiful soup strainer for a x20 performance gain!
add LyricsGooglePluginTest to test_lyrics.py
fix flake8
add test_is_page_candidate()
lyrics.py: remove unnecessary re compile step
Merge pull request #981 from KraYmer/lyrics-enh

Lyrics scraping code refactored