Build with maven "mvn clean install".
place pricingRules.json in root directory of jar.
To run, execute "java -jar checkout-1.0-SNAPSHOT.jar -pricing-rules pricingRules.json" from commandline in target directory
Interface commands
":q" exits current transaction
":r" switches to return mode
"update" to update pricingRule list
"exit" to completely exit program (after :q)
inputs ARE case sensitive