update README for new docs url

Author: jcupitt

README.md

@@ -54,7 +54,7 @@ See the README there, but briefly:
 
    ```
      "require": {
-       "jcupitt/vips" : "1.0.5"
+       "jcupitt/vips" : "1.0.7"
      }
    ```
 
@@ -85,7 +85,7 @@ $ ./try1.php ~/pics/k2.jpg x.tif
 ```
 
 See `examples/`. We have a [complete set of formatted API
-docs](https://libvips.github.io/php-vips/docs/classes/Jcupitt.Vips.Image.html).
+docs](https://libvips.github.io/php-vips/docs/classes/Jcupitt-Vips-Image.html).
 
 ### Introduction to the API