Fix on-secure urls in demo.json

static/demo/demo.json

@@ -8,7 +8,7 @@
                 "text": "<p>The mean center of U.S. population is determined by the United States Census Bureau from the results of each census. Defined as the point at which an imaginary, flat, weightless, and rigid map of the United States would balance perfectly if weights of identical value were placed on it so that each weight represented the location of one person on the date of the census.</p> <span class='vco-note'>This is an overview or title slide to show all the points in your story routed on your map.</span>"
             },
             "media": {
-                    "url":              "http://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/US_Mean_Center_of_Population_1790-2010.PNG/800px-US_Mean_Center_of_Population_1790-2010.PNG",
+                    "url":              "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/US_Mean_Center_of_Population_1790-2010.PNG/800px-US_Mean_Center_of_Population_1790-2010.PNG",
                     "credit":               "wikipedia",
                     "caption":          "Mean US_Mean_Center_of_Population_1790-2010"
                 }
@@ -26,7 +26,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://i1133.photobucket.com/albums/m593/tuitu2u/History%20Pics%203/1790_Census_Map_zpsb0747a02.gif",
+                    "url":              "https://upload.wikimedia.org/wikipedia/commons/2/2e/United_States_1789-08-1790.png",
                     "credit":               "photobucket",
                     "caption":          "1790 Map of the US Census"
                 }
@@ -98,7 +98,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://www.library.yale.edu/MapColl/oldsite/map/va1830.gif",
+                    "url":              "https://www.library.yale.edu/MapColl/oldsite/map/va1830.gif",
                     "credit":               "Yale Library",
                     "caption":          "Map of Virginia"
                 }
@@ -116,7 +116,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://www.youtube.com/watch?v=tkdF8pOFUfI",
+                    "url":              "https://www.youtube.com/watch?v=tkdF8pOFUfI",
                     "credit":               "crashcourse",
                     "caption":          "Crash Course on the Mexican American War"
                 }
@@ -152,7 +152,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://en.wikipedia.org/wiki/Abraham_Lincoln",
+                    "url":              "https://en.wikipedia.org/wiki/Abraham_Lincoln",
                     "credit":               "wikipedia",
                     "caption":          "1860 Abraham Lincoln elected President"
                 }
@@ -170,7 +170,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://www.examiner.com/images/blog/EXID8873/images/reconstruction_congress.jpg",
+                    "url":              "https://www.examiner.com/images/blog/EXID8873/images/reconstruction_congress.jpg",
                     "credit":               "examiner",
                     "caption":          "41st & 42nd Congress newly elected"
                 }
@@ -206,7 +206,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://storify.com/EJSham/minute-by-minute-coverage-of-the-columbus-indiana",
+                    "url":              "https://storify.com/EJSham/minute-by-minute-coverage-of-the-columbus-indiana",
                     "credit":               "Ebony Shamberger",
                     "caption":          "Minute-by-minute coverage of the Columbus, Indiana, plane crash"
                 }
@@ -242,7 +242,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/US-center-pop.jpg/471px-US-center-pop.jpg",
+                    "url":              "https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/US-center-pop.jpg/471px-US-center-pop.jpg",
                     "credit":               "wikipedia",
                     "caption":          "1910 Center of the US Population"
                 }
@@ -278,7 +278,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://www.youtube.com/watch?v=xp9kONt2X54",
+                    "url":              "https://www.youtube.com/watch?v=xp9kONt2X54",
                     "credit":               "You Tube",
                     "caption":          "Judy Garland 1930"
                 }
@@ -296,7 +296,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://illinoisstatesoceity.typepad.com/photos/19411950_illinois_state_s/pearl5.jpg",
+                    "url":              "https://illinoisstatesoceity.typepad.com/photos/19411950_illinois_state_s/pearl5.jpg",
                     "credit":               "Illinois State Society",
                     "caption":          "Chicago Tribune front page 1941"
                 }
@@ -368,7 +368,7 @@
                 "line": true
             },
             "media": {
-                    "url":              "http://upload.wikimedia.org/wikipedia/commons/thumb/9/94/U.S._Territorial_Acquisitions.png/1280px-U.S._Territorial_Acquisitions.png",
+                    "url":              "https://upload.wikimedia.org/wikipedia/commons/thumb/9/94/U.S._Territorial_Acquisitions.png/1280px-U.S._Territorial_Acquisitions.png",
                     "credit":               "wikimedia",
                     "caption":          "United States Territories"
                 }