in src/main/scala/com.gu.conf/GuardianConfigurationStrategy.scala [50:58]
def getDeveloperAccountOverrideProperties(applicationName: String) = {
val home = System getProperty "user.home"
val location = "file://%s/.gu/%s.properties".format(home, applicationName)
log("Loading developer account override properties from " + location)
val properties = loader getPropertiesFrom location
new PropertiesBasedConfiguration(location, properties)
}