Put version information back in repo

This commit adds the files VERSION.tex and CITATION.bib back to
the repository and adds version information to the README file.
The version information was extracted from the git repository
before, but that doesn't help someone who downloads the source
code as a zip file.
Remove figures from repository

Thought better of including the generated pdfs in the repository. Building
the document will work fine without them (from tryinclude).
Reduce simulations for modeling example to shorten execution time.
Update NEWS file