add number 300 and update README

README.mediawiki

@@ -869,6 +869,13 @@ Those proposing changes should consider that ultimately consent may rest with th
 | Standard
 | Draft
 |-
+| [[bip-0300.mediawiki|300]]
+| Consensus (soft fork)
+| Hashrate Escrows (Consensus layer)
+| Paul Sztorc, CryptAxe
+| Standard
+| Draft
+|-
 | [[bip-0301.mediawiki|301]]
 | Consensus (soft fork)
 | Blind Merged Mining (Consensus layer)

bip-0300.mediawiki

@@ -1,5 +1,5 @@
 <pre>
-    BIP: ????
+    BIP: 300
     Layer: Consensus (soft fork)
     Title: Hashrate Escrows (Consensus layer)
     Author: Paul Sztorc <truthcoin@gmail.com>

bip-0300/images.txt

@@ -0,0 +1 @@
+Images used as reference in the documentation.