Add Sophia ML example

test/samples/sample.aes.txt

@@ -0,0 +1,38 @@
+// Contract simulating developers organization
+contract HackBG =
+
+    record state = { developers: map(address, developer) }
+
+    record developer = { name: string
+                       , age: int
+                       , skillset: map(skill, experience) }
+
+    type skill = string
+    type experience = int
+
+    datatype event =
+          LogDeveloperAdded(indexed address, indexed int, string)
+
+    entrypoint init() : state = { developers = {} }
+
+    stateful entrypoint dev_add(account: address, dev_name: string, dev_age: int) =
+        require(!is_member(account), "ERROR_DEVELOPER_ALREADY_EXISTS")
+        let dev : developer = { name = dev_name
+                              , age = dev_age
+                              , skillset = {} }
+        put(state{ developers[account] = dev })
+        Chain.event(LogDeveloperAdded(account, Chain.timestamp, dev_name))
+
+    stateful entrypoint dev_update(account: address, dev_name: string, dev_age: int) =
+        require(is_member(account), "ERROR_DEVELOPER_DOES_NOT_EXIST")
+        put(state{ developers[account].name = dev_name })
+        put(state{ developers[account].age = dev_age })
+
+    function is_member(account: address) : bool =
+        Map.member(account, state.developers)
+
+    stateful entrypoint dev_skill_modify(account: address, skill: string, experience: int) =
+        put(state{ developers[account].skillset[skill] = experience })
+
+    entrypoint dev_get(account: address) : developer =
+        state.developers[account]