bip-0002: Add summary of changes vs BIP 1

Author: luke-jr

bip-0002.mediawiki

@@ -387,6 +387,18 @@ Why is Public Domain no longer acceptable for new BIPs?
 
 * In some jurisdictions, public domain is not recognised as a legitimate legal action, leaving the BIP simply copyrighted with no redistribution or modification allowed at all.
 
+==Changes from BIP 1==
+
+* Acceptable licenses are redefined entirely, allowing a wide variety of open licenses, while prohibiting the problematic older choices.
+* An implementation is now required (when applicable) before BIPs can proceed to Accepted Status.
+* The License preamble headers have been added.
+* BIP Comments are newly introduced.
+* Non-image auxiliary files are permitted in the bip-XXXX subdirectory.
+* The Post-History header may be provided as a link instead of a simple date.
+* The Resolution header has been dropped, as it is not applicable to a decentralised system where no authority exists to make final decisions.
+* Email addresses are now required for authors.
+* Markdown format is no longer permitted for BIPs.
+
 ==See Also==
 
 * [[bip-0001.mediawiki|BIP 1: BIP Purpose and Guidelines]]