Update artworks directory structure.
    
    - Previously, documentation contents were dispersed in several
      documentation formats including Texinfo, Docbook and Asciidoc. This
      made difficult to consolidate documentation efforts since there were
      too many documentation formats and files to maintain. This update
      relocates documentation content inside Artworks/Documentation
      directory using Asciidoc documentation format as default
      documentation format and remove obsolete contents.
    
      Documentation contents available were organized in two articles
      named "The CentOS Project Corporate Visual Identity," and "The
      CentOS Artwork Repository." Documentation contents related to
      automation scripts were moved to manuals under automation scripts
      directory structure.
    
      Once documentation contents in Docbook and Texinfo format were
      relocated using Asciidoc documentation format, Docbook and Texinfo
      related files were removed from the repository.
    
    - Previously, callouts design models were stored inside
      Artworks/Icons/Webenv/Callouts/ and had a render.conf file their
      own. This required final documentation manuals to call callout
      images from Artworks/Icons/Webenv/Callouts/Final. However, because
      images called by final documentation manuals are taken from an
      Images link pointing to Artworks/Icons/Webenv/Final directory there
      was no way for documentation manuals to reach callout images inside
      Artworks/Icons/Webenv/Callouts/Final directory. This update moves
      callout design models from Artworks/Icons/Webenv/Callouts/ directory
      to Artworks/Icons/Webenv/ directory which produces callout images
      under Artworks/Icons/Webenv/Final directory. Once design models were
      moved, the Artworks/Icons/Webenv/Callouts directory was removed.
    
    - Previously, the Artworks/Locales directory was conceived to have
      localization files for all files inside Artworks/ directory
      structure. This contradicts the current implementation of locale
      module. This update relocates localization files inside
      Artworks/Locales directory. Then, removes the Artworks/Locales
      directory from Artworks directory structure. Localization files must
      comply current implementation of locale module.
    
    - Previously, design models related to brand images were conceived
      using millimeters (mm) as base unit. This made difficult to be
      certain about proportion required for web environment images. This
      update changes base unit from millimeters to pixels (px) on design
      models related to brand images.
    
    - Previously, the Artworks/Brands/Logos/Webenv/ directory had one
      sub-directory for each domain-specific set of logos (e.g.,
      centos.org, centos.org.cu, etc.). That produces different directory
      structures final branding images (e.g., logos for centos.org aren't
      stored in the same location of logos for centos.org.cu). This update
      removes domain-specific directory level from repository in order to
      produce all brand information in the same directory structure. To
      prevent images from overlap one another name conventions must be
      use.
    
    - Previously, design model related to powered_by_centos icon was using
      both the centos brand and centos in svg format.  This contradicts
      our intention of not including brand information in svg format
      inside design models but combine final images at production time
      based on configuration files. This update removes both centos brand
      and centos type from design model related to powered_by_centos icon
      and set the appropriate options on the related configuration file to
      combine both centos brand and centos type at rendition time using
      final images.
    
    - Previously, design models related to numbers used on branding didn't
      match the content and protection area set by CentOS symbol and
      CentOS word used to brand images. This lack of uniformity makes
      numbers added to brands to be out of proportions compared both with
      CentOS symbol and CentOS word used in the same brand. This update
      changes the content and protection area of numbers used inside brand
      images to retain relation with both CentOS symbol and CentOS word
      when they are rendered using configuration files.
    
    - Previously, figure titles on documentation manuals were too
      separated from image itself. This update changes the heading.css
      used by documentation manuals to reduce the bottom margin of figure
      titles in 0.3em.
    
    - Previously, design models describing web environment were stored at
      Artworks/Documentation/Webenv but they were rarely used as reference
      to implement any web design. This update removes the
      Artworks/Documentation/Webenv directory entirely.
    
    - Previously, design models describing distribution design models were
      stored at Artworks/Documentation/Themes/Models/Distro/. This
      information has not been used for a long time. This update removes
      design models describing distribution design models entirely from
      Artworks/Documentation/Themes/Models/Distro/ directory and resumes
      how final images are built inside themes through a generic image
      stored at Artworks/Documentation/Corporate/corporate-themes.svgz.