Merge pull request bitcoin#308 from dcousens/patch-2

Add BIP21 Javascript library

Author: luke-jr

bip-0021.mediawiki

@@ -122,3 +122,5 @@ Characters must be URI encoded properly.
 === Bitcoin clients ===
 * Bitcoin-Qt supports the old version of Bitcoin URIs (ie without the req- prefix), with Windows and KDE integration as of commit 70f55355e29c8e45b607e782c5d76609d23cc858.
 
+=== Libraries ===
+* Javascript - https://github.com/bitcoinjs/bip21