docs(guide/overview): Refactor overview and mvc docs

Before, there we multiple overview docs:
- guide/overview
- guide/introduction
- guide/dev_guide.mvc
- guide/dev_guide.mvc.understanding_model
- guide/dev_guide.mvc.understanding_view
- guide/concepts

Now we have:
- guide/introduction: High level description of Angular with the key benefits but without code or any concrete concepts
- guide/concepts: explains all important concepts with a simple example and contains deep links to the other parts of the guide.

 All the old information was moved into existing documents or deleted when they were duplicates.

1 files changed, 2 insertions, 0 deletions

diff --git a/docs/content/guide/di.ngdoc b/docs/content/guide/di.ngdoc
index 0b8cb263..f694ea12 100644
--- a/docs/content/guide/di.ngdoc
+++ b/docs/content/guide/di.ngdoc
@@ -47,6 +47,8 @@ is simply handed the `greeter` at runtime.
 This is desirable, but it puts the responsibility of getting hold of the dependency on the
 code that constructs `SomeClass`.
 
+<img class="pull-right" style="padding-left: 3em; padding-bottom: 1em;" src="img/guide/concepts-module-injector.png">
+
 To manage the responsibility of dependency creation, each Angular application has an {@link
 api/angular.injector injector}. The injector is a service locator that is responsible for
 construction and lookup of dependencies.