Merge pull request #23 from kabalin/docs

Few more minor doc improvements.

Author: stronk7

docs/Help.md

@@ -19,6 +19,7 @@ changed.  Also a good place to look for new goodies.
 
 ## Upgrade guides
 
+* [Upgrading to Version 3](UPGRADE-3.0.md)
 * [Upgrading to Version 2](UPGRADE-2.0.md)
 
 
@@ -27,3 +28,7 @@ changed.  Also a good place to look for new goodies.
 If the above links do not help you, and Google has failed you as well, then please feel free
 to submit an [new issue](https://github.com/moodlehq/moodle-plugin-ci/issues/new) providing
 as many relevant details as possible.
+
+Also, it is sometimes useful to dig into source code of `moodle-plugin-ci`, this may
+help to understand what is done on background and identify why something does
+not work as expected for you.

docs/UPGRADE-3.0.md

@@ -18,8 +18,7 @@ Detailed information about what changed in Version 3 can be found in the [change
 Review the updated [.travis.dist.yml](https://github.com/moodlehq/moodle-plugin-ci/blob/master/.travis.dist.yml)
 and update your `.travis.yml` file in your plugin. For detailed information about the contents of `.travis.dist.yml`
 file, please see this [help document](TravisFileExplained.md).  **Please carefully** review the updated
-`.travis.dist.yml` as some steps have been removed and others added, like installation of Java 8,
-upgrade of NodeJS, etc.
+`.travis.dist.yml` as some steps have been removed (like installation of Java 8, installing of NodeJS, etc.) and others added.
 
 A summary of the actions required may be: