Merge branch 'readme' into 'master'

Add README

See merge request !16

README.md

+# Forschungszentrum Jülich LaTeX Beamer Theme
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+This repository hosts the LaTeX Beamer theme for presentations using the Forschungszentrum Jülich corporate design.
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+Documentation and outline of features can be seen in the tutorial, see [tutorial.pdf](tutorial/tutorial.pdf).
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+Contributions are welcome! Please either file an issue or directly submit a merge request.