Update README.md - add CTA to watch Mastering CI/CD webcast and 5 teams that...

Update README.md - add CTA to watch Mastering CI/CD webcast and 5 teams that made the switch to GitLab CI/CD article

doc/ci/README.md

@@ -13,6 +13,11 @@ through the [continuous methodologies](introduction/index.md#introduction-to-cic
 - Continuous Delivery (CD)
 - Continuous Deployment (CD)
 
+NOTE: **Out-of-the-box management systems can decrease hours spent on maintaining toolchains by 10% or more.**
+Watch our
+["Mastering continuous software development"](https://about.gitlab.com/webcast/mastering-ci-cd/)
+webcast to learn about continuous methods and how GitLab’s built-in CI can help you simplify and scale software development. 
+
 ## Overview
 
 Continuous Integration works by pushing small code chunks to your
@@ -155,6 +160,7 @@ for your CI/CD infrastructure:
 
 - [Why we chose GitLab CI for our CI/CD solution](https://about.gitlab.com/2016/10/17/gitlab-ci-oohlala/)
 - [Building our web-app on GitLab CI](https://about.gitlab.com/2016/07/22/building-our-web-app-on-gitlab-ci/)
+- [5 Teams that made the switch to GitLab CI/CD](https://about.gitlab.com/2019/04/25/5-teams-that-made-the-switch-to-gitlab-ci-cd/)
 
 See also the [Why CI/CD?](https://docs.google.com/presentation/d/1OGgk2Tcxbpl7DJaIOzCX4Vqg3dlwfELC3u2jEeCBbDk) presentation.
 

doc/ci/introduction/index.md

@@ -9,6 +9,11 @@ In this document we'll present an overview of the concepts of Continuous Integra
 Continuous Delivery, and Continuous Deployment, as well as an introduction to
 GitLab CI/CD.
 
+NOTE: **Out-of-the-box management systems can decrease hours spent on maintaining toolchains by 10% or more.**
+Watch our
+["Mastering continuous software development"](https://about.gitlab.com/webcast/mastering-ci-cd/)
+webcast to learn about continuous methods and how GitLab’s built-in CI can help you simplify and scale software development.
+
 ## Introduction to CI/CD methodologies
 
 The continuous methodologies of software development are based on

doc/ci/pipelines.md

@@ -6,6 +6,11 @@ type: reference
 
 > Introduced in GitLab 8.8.
 
+NOTE: **Tip:**
+Watch our
+["Mastering continuous software development"](https://about.gitlab.com/webcast/mastering-ci-cd/)
+webcast to see a comprehensive demo of GitLab CI/CD pipeline.
+
 ## Introduction
 
 Pipelines are the top-level component of continuous integration, delivery, and deployment.