Update themes location:
- Move both artistic motifs and design models into
trunk/Identity/Images/Themes and trunk/Identity/Models/Themes,
respectively.
- When we render an artistic motif we can use the `--theme-model'
option to use a design model different from Default.
- In this configuration, massive rendition of artistic motifs
needs to be reconsidered. Artistic motifs are produced one by
one and there is no possible way to render them as we do with
brands, for example.
To produce artistic motifs it is necessary to provide, the
artistic motif name and version in order for the render
functionality of centos-art.sh script to transform the path
information from artistic motif to design models.
The artistic motif name and version are retrived from the
artistic motif absolute path. So, in order to produce artistic
motifs massively, we need to create a list of all artistic
motifs available (which should include the name and version
directory levels) and then reduce it using the path provided as
pattern.