migrate cadence source code, remove unused old utility contracts, update flow.json

Author: bartolomej

cadence/contracts/.gitkeep

@@ -3,9 +3,9 @@
 // A simple Person contract 
 // 
 // reference: https://developers.flow.com/cadence/language/contracts
-pub contract Person {
+access(all) contract Person {
     // declaration of a public variable
-    pub var name: String
+    access(all) var name: String
 
 
     // initialization method for our contracts, this gets run on deployment
@@ -14,21 +14,21 @@ pub contract Person {
 
     }
 
-    pub fun sayHello(): String {
+    access(all) fun sayHello(): String {
         return "Hello, my name is ".concat(self.name)
     }
 
     // create a new friendship resource 
-    pub fun makeFriends(): @Friendship {
+    access(all) fun makeFriends(): @Friendship {
         return <-create Friendship()
     }
 
     // Friendship resource are types of values that can only exist in one place 
     // 
     // read more about this unique and powerful Cadence feature here https://developers.flow.com/cadence/language/resources
-    pub resource Friendship {
+    access(all) resource Friendship {
         init() {}
-        pub fun yaay() {
+        access(all) fun yaay() {
             log("such a nice friend") // we can log to output, useful on emualtor for debugging
         }
     }