Screen Readers (#53)

* add tikzcache

* ignore files

* add latexmkrc file

* Move figures to new files

* rename images

* Fix build commands

* Release as epub3 and mobi

* Add cover-image support

* use older epub

* Externalize all tables

* change gh actions command

* fix linux xargs rm

.github/workflows/main.yml

@@ -15,7 +15,6 @@ jobs:
           run: |
             apk add make
             cd book
-            make all
             make release
       - name: Release book on S3
         uses: shallwefootball/s3-upload-action@master

.github/workflows/validate.yml

@@ -12,4 +12,4 @@ jobs:
           run: |
             apk add make
             cd book
-            make all
+            make build_pdf