Update docbook packages and dependencies

Add pre-built binaries

* Fixed gtk_doc, docbook, and tools to skip creation of binaries.

* Cleaned up a little.

* Fix circular dependency that leaves gtk_doc to hang.

* Removed docbook_xsl dependency from gtk_doc

* Added libxslt dependency to gtk_doc

* Fixed circular dependencies

* Reverted docbook_xml source sha256sum, firewall threw it off.

* Added libxml2_python dependency to libxslt

* Removed libxml2 and unzip dependencies from packages

* Made sure to use crew variables instead of hardcoded paths.

* added files to docbook package.

* Fixed packages to create the catalog in the postinstall

* Removed exclusions of those packages for binary builds

* Removed some lines from the packages that conflicted with the other package's files.

* Forces to recreate the catalog and the docbook catalog every time package is reinstalled.

* Updated docbook_xsl to track the XML catalog.

* The catalog and docbook files are now tracked in both packages. Fully tested and working.

* Now uses variables for docbook version numbers, removed the warning about binaries.

Fixes @uberhacker's requests.

Add antlr4 package

Update bz2 to add missing shared library file

Add libgsf package

Add pre-built binaries

Add gtk_doc dependency

Add pre-built binaries

Update libmypaint so it can compile with gegl support

Add pre-built binaries for mypaint_brushes

Add pre-built binaries

Add gstreamer package including pre-built binaries

Add libgnomecanvas package

Enable glade support

Add pre-built binaries

Update code from 1.25 to 1.25.1

Update julia package

Revert from 1.26.1 to 1.25.1

Add enscript package and libpth dependency

Update lua from 5.3.4-1 to 5.3.5

Add libpeas package

Add libart package

* Fix ISL compatibility symlink

* Add pre-built binaries

Add pre-built binaries

Add pre-built binaries

Add pre-built binaries

Add pre-built binaries

Add pre-built binaries for bz2, gegl, gexiv2, libexiv2, libssh, poppler_data and pygobject

Add options to the gexiv2 and libexiv2 packages

Add dependencies to gegl

Add more gegl dependencies

Add libssh package

Add libssh dependency to libexiv2

Add dependencies to gegl

Fix poppler_data install

Make rust a build dependency in librsvg

Add pre-built binaries

* Delete slack.jpg

* Discord and Slack logos

* Add chat links and logos

* Remove large discord logo

* Remove large slack logo

* Upload properly sized chat logos

* Mention chat sync

* Add poppler-data

* changed CREW_PREFIX to CREW_DEST_DIR

whoops, sorry about that

* Changed CREW_DEST_DIR to CREW_DEST_PREFIX

Also fixed grammar in description

* change "prefix" to "--prefix"

Disable binaries, Bintray links are broken.

* Add PyGObject

* Remove "core" dependencies

* Add mypaint-brushes

* add patch sha256sum check

* Add gexiv2

* canonical source