Make all datasets in sampledata lazy

Author: mattpap

sampledata/src/main/scala/package.scala

@@ -1,30 +1,30 @@
 package io.continuum.bokeh {
     package sampledata {
         package object iris {
-            val flowers = Flowers.load()
+            lazy val flowers = Flowers.load()
         }
 
         package object mtb {
-            val obiszow_mtb_xcm = MTB.load("obiszow_mtb_xcm.csv")
+            lazy val obiszow_mtb_xcm = MTB.load("obiszow_mtb_xcm.csv")
         }
 
         package object daylight {
-            val Warsaw2013 = Daylight.load("daylight_warsaw_2013.csv")
+            lazy val Warsaw2013 = Daylight.load("daylight_warsaw_2013.csv")
         }
 
         package object webbrowsers {
-            val webbrowsers_nov_2013 = WebBrowsers.load("browsers_nov_2013.csv")
+            lazy val webbrowsers_nov_2013 = WebBrowsers.load("browsers_nov_2013.csv")
         }
     }
 
     package object sampledata {
-        val autompg        = AutoMPG.load()
-        val periodic_table = PeriodicTable.load()
-        val sprint         = Sprint.load()
-        val unemployment   = Unemployment.load()
-        val us_counties    = USCounties.load()
-        val us_holidays    = USHolidays.load()
-        val us_states      = USStates.load()
-        val world_cities   = WorldCities.load()
+        lazy val autompg        = AutoMPG.load()
+        lazy val periodic_table = PeriodicTable.load()
+        lazy val sprint         = Sprint.load()
+        lazy val unemployment   = Unemployment.load()
+        lazy val us_counties    = USCounties.load()
+        lazy val us_holidays    = USHolidays.load()
+        lazy val us_states      = USStates.load()
+        lazy val world_cities   = WorldCities.load()
     }
 }