Assorted improvements I had sitting here for some time

Mostly around d/control but also a fix to better handle beta releases.

debian/control

@@ -19,9 +19,13 @@ Depends:
  python3-yaml,
  ${misc:Depends},
 Recommends:
+ build-essential,
+ ccache,
  git-buildpackage,
  uncrustify,
  elpa-gitlab-ci-mode,
+Suggests:
+ librem5-dev-tools,
 Description: Scripts to make the life of a Librem 5 developer easier
  Contains the following scripts:
  .
@@ -29,3 +33,9 @@ Description: Scripts to make the life of a Librem 5 developer easier
    sloppy builds.
  * l5-mr-fetcher: Download and install latest CI artifact for Merge Requests
    on the Librem 5
+ * setup-pureos-pkg-repo: Setup a gitlab repo for PureOS packaging
+ * check-pureos-pkg-repo: Check the configuration of a PureOS packaging repo
+ * mk-gitlab-rel: Help with releases for gitlab projects
+ * project-next: Help maintaining a project's "next" branch with merge requests
+   under testing.
+ * l5-fetch-next: Install CI artifacts from a project's next branch