Fix order in manifest of 2020/ferguson1

The play.sh script entry_text refers to snake-colours.sh so
snake-colours.sh comes first. Also since it's a key part of the entry
they come before the html files.

2020/ferguson1/.entry.json

@@ -41,6 +41,22 @@
 	    "display_via_github" : true,
 	    "entry_text" : "original source code"
 	},
+	{
+	    "file_path" : "snake-colours.sh",
+	    "inventory_order" : 60,
+	    "OK_to_edit" : true,
+	    "display_as" : "shellscript",
+	    "display_via_github" : true,
+	    "entry_text" : "script to configure colours of game"
+	},
+	{
+	    "file_path" : "play.sh",
+	    "inventory_order" : 61,
+	    "OK_to_edit" : true,
+	    "display_as" : "shellscript",
+	    "display_via_github" : true,
+	    "entry_text" : "like snake-colours.sh with pre-configured gameplay modes"
+	},
 	{
 	    "file_path" : "COMPILING.html",
 	    "inventory_order" : 100,
@@ -97,22 +113,6 @@
 	    "display_via_github" : false,
 	    "entry_text" : "many different gameplay modes described"
 	},
-	{
-	    "file_path" : "play.sh",
-	    "inventory_order" : 100,
-	    "OK_to_edit" : true,
-	    "display_as" : "shellscript",
-	    "display_via_github" : true,
-	    "entry_text" : "like snake-colours.sh with pre-configured gameplay modes"
-	},
-	{
-	    "file_path" : "snake-colours.sh",
-	    "inventory_order" : 100,
-	    "OK_to_edit" : true,
-	    "display_as" : "shellscript",
-	    "display_via_github" : true,
-	    "entry_text" : "script to configure colours of game"
-	},
 	{
 	    "file_path" : "spoilers.html",
 	    "inventory_order" : 100,