First commit con Dedication

First example
Replace all `.svg` by `.*` so images work for HTML **and** PDF version.
Fixing the SVG2PDF conversion for filenames with quotes.
Also convert SVGs in the model folders.

Not quite working yet.
PDF generation for PDF version now fixed (thanks to @sjoelund)
Fixes limit in number of arguments for the `rm` command.

...by using a loop instead.
Wrong file extension for image files (.mo instead of .*)
Also ignore pdf files inside the ModelicaByExample folder
Update `Plant.svg` with a version that is not marked. Issue #90
Fixes a footnote link syntax.
Removes superfluous `'s`.
Fixes a too long lines in source codes.
Switch to `rsvg-convert` for SVG2PDF conversion

It does a better job than Inkscape.
Added comments

If you like it.

I also though about Units, e.g. there is Modelica.SIunits.TimeAging for alpha and gamma, but no specific TimeAging for beta and delta.
Correct the `.gitignore` file.
Fixed typo
Test of chinese character handling
Merge pull request #96 from tbeu/patch-4

Fixed typo
Merge pull request #91 from dietmarw/updateImage

Update `Plant.svg` with a version that is not marked. Issue #90
Merge pull request #92 from dietmarw/fixPDFexport

Fix pdfexport