update requirements and note analysis addition in changelog

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 * Require a minimum of 2 players
 * Implement a check on scores in case bad values are entered
+* Sample game data and an analysis notebook in the `analysis/` directory
 
 ### 0.1.1
 

README.md

@@ -6,6 +6,7 @@ Score keeping software for [Carcassonne](https://boardgamegeek.com/boardgame/822
 
 * python 3 (tested under python 3.6.x)
 * numpy
+* matplotlib (for analysis scripts)
 
 ## Usage