Rename upload-pin to create-image

It didn't make sense to call it upload-pin as it is being used only for
creating the Image object.

pinry/pins/urls.py

@@ -7,7 +7,7 @@ from .views import CreateImage
 urlpatterns = patterns('pinry.pins.views',
     url(r'^pin-form/$', TemplateView.as_view(template_name='core/pin_form.html'),
         name='pin-form'),
-    url(r'^upload-pin/$', CreateImage.as_view(), name='upload-pin'),
+    url(r'^create-image/$', CreateImage.as_view(), name='create-image'),
     url(r'^tag/(?P<tag>(\w|-)+)/$', TemplateView.as_view(template_name='core/pins.html'),
         name='tag-pins'),
     url(r'^$', TemplateView.as_view(template_name='core/pins.html'),

pinry/static/js/pin-form.js

@@ -65,7 +65,7 @@ $(window).load(function() {
         // Drag and Drop Upload
         $('#pin-form-image-upload').fineUploader({
             request: {
-                endpoint: '/pins/upload-pin/',
+                endpoint: '/pins/create-image/',
                 paramsInBody: true,
                 multiple: false,
                 validation: {