Update index.html

Added a website for playing a song by entering songtexts/lyrics.
add readme for contributors
Merge pull request #14 from lucb1e/master

Added a website for playing a song by entering songtexts/lyrics.
Added recursive solution to first world problem
Merge pull request #16 from minghan/master

Added website that is guaranteed to solve your first world problem
Add chosen library drop-down list

Chosen is a jquery plugin that allows for searching within a list.
This, of course, adds a jquery dependency.
Merge branch 'master' of github.com:askhugo/firstworldproblems.biz