Add more docs around m.route (#1089)

docs/v1.x-migration.md

@@ -9,6 +9,8 @@ Migrating from `v0.2.x` to `v1.x`
 - [Component arguments](#component-arguments)
 - [Passing components to `m()`](#passing-components-to-m)
 - [`m.route` and anchor tags](#mroute-and-anchor-tags)
+- [Reading/writing the current route](#readingwriting-the-current-route)
+- [Accessing route params](#accessing-route-params)
 
 ## `config` function
 
@@ -197,3 +199,58 @@ m("a", {
     oncreate : m.route.link
 })
 ```
+
+## Reading/writing the current route
+
+In `v0.2.x` all interaction w/ the current route happened via `m.route()`. In `v1.x` this has been broken out into two functions.
+
+### `v0.2.x`
+
+```js
+// Getting the current route
+m.route()
+
+// Setting a new route
+m.route("/other/route");
+```
+
+### `v1.x`
+
+```js
+// Getting the current route
+m.route.getPath();
+
+// Setting a new route
+m.route.setPath("/other/route");
+```
+
+## Accessing route params
+
+In `v0.2.x` reading route params was all handled through the `m.route.param()` method. In `v1.x` any route params are passed as the `attrs` object on the vnode passed as the first argument to lifecycle methods/`view`.
+
+### `v0.2.x`
+
+```js
+m.route(document.body, "/booga", {
+    "/:attr" : {
+        view : function() {
+            m.route.param("attr"); // "booga"
+        }
+    }
+});
+```
+
+### `v1.x`
+
+```js
+m.route(document.body, "/booga", {
+    "/:attr" : {
+        oninit : function(vnode) {
+            vnode.attrs.attr; // "booga"
+        },
+        view : function(vnode) {
+            vnode.attrs.attr; // "booga"
+        }
+    }
+});
+```