Added some wrap review docs. [skip ci]

docs/markdown/Adding-new-projects-to-wrapdb.md

@@ -201,6 +201,14 @@ git commit -a --amend
 git push --force
 ```
 
+### Request a new release version to an existing repository
+
+Adding new releases to an existing repo is straightforward. All you
+need to do is to follow the rules discussed above but when you create
+the merge request, file it against the master branch. The repository
+reviewer will create the necessary branch and retarget your merge
+request accordingly.
+
 ## What is done by WrapDB maintainers
 
 [mesonwrap tools](Wrap-maintainer-tools.md) must be used for the tasks
@@ -246,4 +254,8 @@ system has native support for Git subprojects.
 
 ## Reviewing wraps
 
-See [Wrap review guidelines](Wrap-review-guidelines.md).
+See [Wrap review guidelines](Wrap-review-guidelines.md), especially
+the part about tooling that you can use to check for the most common
+problems yourself. Fixing all issues reported by the tool is a
+mandatory requirement for getting your MR accepted, so doing this
+proactively makes the review process smoother.

docs/markdown/Wrap-review-guidelines.md

@@ -26,6 +26,32 @@ $ cat ~/.config/mesonwrap.ini
 github_token = <github token>
 ```
 
+## Setting up the review tooling
+
+The [Mesonwrap](https://github.com/mesonbuild/mesonwrap/) repository
+contains review tooling. It is used to do the actual review, but
+submitters can also use it to check their MRs. All issues reported by
+the tool must be fixed, so using the tool can speed up the review
+process considerably.
+
+The tool has some dependencies that are not available in all Linux
+distributions. Thus using a Python
+[Virtualenv](https://virtualenv.pypa.io/en/stable/). The tool can be
+installed with the following commands.
+
+```
+git clone https://github.com/mesonbuild/mesonwrap.git
+cd mesonwrap
+python3 -m venv venv
+bash
+source venv/bin/activate
+pip install -r requirements.txt
+# You may need to install Meson and Ninja here as well depending on your setup
+python3 setup.py install
+mesonwrap review <see arguments below>
+exit             <when you are finished>
+```
+
 ## Reviewing code
 
 ```