Update CHANGES and test-project

CHANGES.md

@@ -1,7 +1,7 @@
 # Rojo Change Log
 
 ## Current master
-* *No changes*
+* When `rojo.json` points to a file or directory that does not exist, Rojo now issues a warning instead of throwing an error and exiting
 
 ## 0.4.12 (June 21, 2018)
 * Fixed obscure assertion failure when renaming or deleting files ([#78](https://github.com/LPGhatguy/rojo/issues/78))

test-project/rojo.json

@@ -9,6 +9,10 @@
     "extra": {
       "path": "extra-script.lua",
       "target": "ReplicatedStorage.ExtraScript"
+    },
+    "does-not-exist": {
+      "path": "hahah",
+      "target": "ReplicatedStorage.Never"
     }
   }
 }