took out "b block" costume from catalog

Costumes/COSTUMES

@@ -85,7 +85,6 @@ bat2-a.png	bat2 a
 bat2-a_.svg	bat2 a 
 bat2-b.png	bat2 b
 bat2-b_.svg	bat2 b 
-b-block.svg	b block
 beachball.svg	beachball
 bear1-a.svg	bear1 a
 bear1-b.svg	bear1 b

HISTORY.md

@@ -52,6 +52,7 @@
 * added note / hz conversion blocks to audioComp library
 * ported multiline library to new (custom input slot) format
 * new "text costumes" library for generating costumes from letters or words of text
+* took out "b block" costume from catalog
 
 ### 2019-03-10
 * Objects, Blocks, Threads: added microphone note and pitch detection