converter cli + tests

.gitlab-ci.yml

@@ -110,8 +110,8 @@ pages:
     - pwd
     - apt-get update
     - apt install -y git
-    - apt install -y inkscape pdftk
-    - apt install -y latexmk
+    - apt install -y inkscape pdftk # pdftk to grap pdf pages (only for converter; can probably be omitted).
+    - apt install -y latexmk  poppler-utils # latexmk and pdftocairo
     - pip install -U Pillow
     - pip install -e ./
     - apt install -y python-opengl xvfb # Virtual framebuffer for GL stuff.