Update README.md

Add charts.

Author: erichiggins

powder-humidity/README.md

@@ -6,12 +6,18 @@ The environmental conditions (temperature, relative humidity, dew point) were al
 Each sample started as 20.000 grams of Varget (from the same 1 lb jug).
 
 ### Samples
-- A: Stored in direct contact with a 50% humidity pack, sealed in an airtight container.
-- B: Stored in the same airtight container as Sample A, but not in direct contact with the humidity pack.
-- C: Stored in an MTM container with (but not in) the airtight container as Sample A & B. These three samples were stored in my garage.
-- D: Stored indoors in a closed cabinet.
+- **A:** Stored in direct contact with a 50% humidity pack, sealed in an airtight container.
+- **B:** Stored in the same airtight container as Sample A, but not in direct contact with the humidity pack.
+- **C:** Stored in an MTM container with (but not in) the airtight container as Sample A & B. These three samples were stored in my garage.
+- **D:** Stored indoors in a closed cabinet.
 
 ### Kestrel Drops
-- Blue: Stored with Sample A & B.
-- Orange: Stored with Sample C.
-- Green: Stored with Sample D.
+- **Blue:** Stored with Sample A & B.
+- **Orange:** Stored with Sample C.
+- **Green:** Stored with Sample D.
+
+## Powder Weight Chart
+![Powder Weight Chart](./powder-chart.svg)
+
+## Environment Chart
+![Environment Chart](./env-chart.svg)