Update Makefile aliases and handle distutils

Makefile

@@ -2,20 +2,20 @@
 
 # Install dependencies & fetch data
 install:
-	./startup.sh
+	./startup.sh lagged_oil_unrate
 
 # Download FRED data (if needed)
 data:
-	./startup.sh scripts/refresh_data.py
+	./startup.sh refresh_data
 
 # Default 18-month lag plot
 plot:
-	./startup.sh
+	./startup.sh lagged_oil_unrate
 
 # Custom plot of arbitrary series
 # Usage: make plot-custom ARGS="--series UNRATE CPIAUCSL --start 2000-01-01"
 plot-custom:
-	./startup.sh python scripts/custom_chart.py $(ARGS)
+	./startup.sh custom_chart $(ARGS)
 
 # Run tests
 test: