[tune] Support RESTful API for the Web Server (#4080)

Change the client/server API to RESTful design. This includes resource modeling, model URI's, and correct HTTP methods.

python/ray/tune/TuneClient.ipynb

@@ -8,7 +8,7 @@
    "source": [
     "from ray.tune.web_server import TuneClient\n",
     "\n",
-    "manager = TuneClient(tune_address=\"localhost:4321\")\n",
+    "manager = TuneClient(tune_address=\"localhost\", port_forward=4321)\n",
     "\n",
     "x = manager.get_all_trials()\n",
     "\n",
@@ -19,7 +19,6 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "collapsed": true,
     "scrolled": false
    },
    "outputs": [],
@@ -31,9 +30,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "import yaml\n",
@@ -45,9 +42,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "name, spec = [x for x in d.items()][0]"
@@ -79,7 +74,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.2"
+   "version": "3.6.8"
   }
  },
  "nbformat": 4,