Fix links in several docs

This fixes #153.

doc/howto/runner.md

@@ -65,7 +65,7 @@ for your operating system
 To build from source, you'll need to set up a development environment manually -
 GDK doesn't manage it for you. The official GitLab Runner repository is
-[here](https://gitlab.org/gitlab-org/gitlab-ci-multi-runner); just follow
+[here](https://gitlab.com/gitlab-org/gitlab-ci-multi-runner); just follow
 [the development instructions](https://docs.gitlab.com/runner/development/).
 All the methods should (eventually) create a `gitlab-ci-multi-runner` binary.

doc/prepare.md

@@ -188,7 +188,7 @@ it here.
 ### Next Steps
-After you have completed everything here, please proceed to [Set-up GDK](doc/set-up-gdk.md)
+After you have completed everything here, please proceed to [Set-up GDK](./set-up-gdk.md)
 [puias]: https://gitlab.com/gitlab-org/gitlab-recipes/tree/master/install/centos#add-puias-computational-repository
 [docker engine]: https://docs.docker.com/engine/installation/

doc/set-up-gdk.md

@@ -48,7 +48,7 @@ Alternatively, you can clone all components from their official source.
 gdk install
 ```
-If you are going to work on Gitlab Geo, you will need [PostgreSQL replication](#postgresql-replication) setup before the "Post-installation" instructions.
+If you are going to work on Gitlab Geo, you will need [PostgreSQL replication](./howto/postgresql_replication.md) setup before the "Post-installation" instructions.
 ## GitLab Enterprise Edition
@@ -101,7 +101,7 @@ Similarly, you can override the host (for example if you plan to use GDK inside
 If you want to work on GitLab CI you will need to install [GitLab Runner](https://gitlab.com/gitlab-org/gitlab-ci-multi-runner).
-To enable the OpenLDAP server, see the OpenLDAP instructions in this readme.
-After installation [learn how to use GDK](doc/howto/README.md).
+To enable the OpenLDAP server, see the OpenLDAP instructions in this [README](./howto/ldap.md).
+After installation [learn how to use GDK](./howto/README.md).

doc/vagrant.md

@@ -89,4 +89,4 @@ OSes like Windows/OSX you will have to run the entire Docker hypervisor in a VM
 ## Next step
-After installation [learn how to use GDK](doc/howto/README.md).
+After installation [learn how to use GDK](./howto/README.md).