Promote BIP 2 Draft->Active, and implement it

- Update all Accepted status to Proposed (renamed status)
- The BIP Comments preamble headers added to every BIP
- The License preamble headers have been added to all BIPs with a Copyright section

bip-0010.mediawiki

@@ -3,6 +3,8 @@
   Layer: Applications
   Title: Multi-Sig Transaction Distribution
   Author: Alan Reiner <etotheipi@gmail.com>
+  Comments-Summary: No comments yet.
+  Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0010
   Status: Withdrawn
   Type: Informational
   Created: 2011-10-28