Added new build process information to the project README
Added new build process information to the project README

openspending/openspendingjs,RCGTDev/openspendingjs,openspending/openspendingjs,RCGTDev/openspendingjs,openspending/openspendingjs,openspending/openspendingjs-old,openspending/openspendingjs,openspending/openspendingjs-old,openspending/openspendingjs-old,RCGTDev/openspendingjs,RCGTDev/openspendingjs,openspending/openspendingjs-old