Only geocode for rspec contexts where geocoding: true

Ameliorates #59

Also don't link IDL script in test env

app/views/layouts/application.html.haml

@@ -34,5 +34,6 @@
     = render :partial => "devise/login_modal"
 
     =yield :scripts
-    :javascript
-      window._idl={};_idl.variant="banner";(function(){var e=document.createElement("script");e.type="text/javascript";e.async=true;e.src=("https:"==document.location.protocol?"https://":"http://")+"members.internetdefenseleague.org/include/?url="+(_idl.url||"")+"&campaign="+(_idl.campaign||"")+"&variant="+(_idl.variant||"banner");document.getElementsByTagName("body")[0].appendChild(e)})()
+    - unless Rails.env.test?
+      :javascript
+        window._idl={};_idl.variant="banner";(function(){var e=document.createElement("script");e.type="text/javascript";e.async=true;e.src=("https:"==document.location.protocol?"https://":"http://")+"members.internetdefenseleague.org/include/?url="+(_idl.url||"")+"&campaign="+(_idl.campaign||"")+"&variant="+(_idl.variant||"banner");document.getElementsByTagName("body")[0].appendChild(e)})()

spec/controllers/application_controller_spec.rb

@@ -8,7 +8,7 @@ def nyc_location
 
     mock_location
   end
-  describe "current_school" do
+  describe "current_school with geocoding on", geocode: true do
 
     it "defaults to school for the nearest venue" do
       school1 = create(:school)

spec/support/gmaps4rails.rb

@@ -0,0 +1,9 @@
+RSpec.configure do |config|
+  config.before(:each) do |example|
+    unless self.class.metadata[:geocode] == true
+      Gmaps4rails::ModelHandler.any_instance.stub(:prevent_geocoding?) do
+        true
+      end
+    end
+  end
+end