JSTD adapter for running e2e tests

Couple of changes into angular.scenario runner:
 - add autotest config (runs tests when document ready)
 - update ObjectModel (forwards events)
 - use only one ObjectModel instance for all outputters
 - expose error msg and line number in ObjectModel.Spec and ObjectModel.Step
 - fix generating spec.ids
 - fix 'html' output so that it does not mutate ObjectModel

Couple of changes into docs / generator:
 - rename copy -> copyTpl
 - move docs/static into docs/examples (to avoid conflict with jstd proxy)

Running all docs e2e tests:
========================================================
1/ compile angular-scenario, jstd-scenario-adapter
>> rake compile

2/ build docs
>> rake docs

3/ start jstd server
>> ./server-scenario.sh

4/ capture some browser

5/ run node server to serve static content
>> node ../lib/nodeserver/server.js

6/ run tests
>> ./test-scenario.sh

1 files changed, 2 insertions, 4 deletions

diff --git a/src/scenario/output/Json.js b/src/scenario/output/Json.js
index 2c852496..1e3bef6b 100644
--- a/src/scenario/output/Json.js
+++ b/src/scenario/output/Json.js
@@ -1,10 +1,8 @@
 /**
  * Generates JSON output into a context.
  */
-angular.scenario.output('json', function(context, runner) {
-  var model = new angular.scenario.ObjectModel(runner);
-
-  runner.on('RunnerEnd', function() {
+angular.scenario.output('json', function(context, runner, model) {
+  model.on('RunnerEnd', function() {
     context.text(angular.toJson(model.value));
   });
 });