major revamp of http client functionalit

test/data/bad/bad-enum.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {

test/data/bad/missing-required-property.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {

test/data/good/alternate-syntax.json

@@ -1,7 +1,7 @@
 [
   {
     "verb": "gather",
-    "action": "https://00dd977a.ngrok.io/gather",
+    "actionHook": "https://00dd977a.ngrok.io/gather",
     "input": ["speech"],
     "timeout": 12,
     "recognizer": {

test/data/good/dial-listen.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {

test/data/good/dial-phone.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {

test/data/good/dial-sip.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {

test/data/good/dial-transcribe.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {
@@ -9,7 +9,7 @@
       }
     ],
     "transcribe": {
-      "transcriptionCallback": "http://example.com/transcribe",
+      "transcriptionHook": "/transcribe",
       "recognizer": {
         "vendor": "google",
         "language" : "en-US",

test/data/good/dial-user.json

@@ -1,6 +1,6 @@
 {
   "dial": {
-    "action": "http://example.com",
+    "actionHook": "http://example.com",
     "callerId": "+1312888899",
     "target": [
       {