Use new lyricwiki url.

 The old url isn't working, so updated the code to use the new lyricwiki url.
 Put regular expresions into consant values, to make the code more readable, also
to make it easier to debug in case that the html format changes.
 Added the song title to the beginning of the buffer, and set the lyrics buffer
in view-mode so the user can rapidly exit using `q'.
Retrieve lyrics from http://makeitpersonal.co instead of http://lyrics.wikia.com.
Updating to 1.5.